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Small fish for aquarium

maintenance, care, compatibility

The most unpretentious and small aquarium fish with photos

I think many aquarium fish experts will agree that the first place is given to guppes.

Everyone probably knows these fish … even those who have never seen aquariums. We can say that these fish are the fish of all children of the former USSR (they were in all Soviet aquariums))).

The fish is very beautiful and unpretentious. The tail fin is her beauty.

The simplicity of the fish is that it can withstand “difficult conditions of detention.” I happened to see an aquarium with guppies. without aeration, without filtering, without plants, without proper feeding etc. – horror, terrible dream aquarist. Nevertheless, guppies managed not only to survive in such an aquarium, but even tried to multiply.

So to mock the fish of course not worth it. But their endurance and vitality sometimes affects.


2nd place Swordtails

A very famous fish, as a result of persistent selection, a large number of swordtails of various colors and shapes were bred. Males differ from females by the presence of a “sword” on the lower edge of the caudal fin.

Swordtails are kept in flocks in a densely planted aquarium. The minimum size of the aquarium from 10 liters (but better is more).

A good volume of aquarium for a small group of swordtails is 50 liters.

An interesting fact about these fish is that the female swordtail can, at some point, become a male, i.e. change the floor. This is due to the struggle for the survival of the species.


Read about swordsmen more in detail here.

3rd place Somiki corridors

It should begin with the fact that all aquarium catfish – a priori unpretentious. Moreover, they are “orderlies of the aquarium world”: they clean the soil and eat the remnants of life activity.

The corridors are chosen from all catfish, since in addition to the gill, they have intestinal respiration, those. if aeration stops, they will live for a long time.

The fish are very peaceful, calm. They slowly swim along the bottom in search of food.

In the aquarium they are usually kept in flocks. Fish, do not pose any threat to other inhabitants of the aquarium.

You can read more about CORRIDORATUS here.

4th place Mollies

Molly, like guppies – viviparous fishes. Unpretentious and tolerant of poor conditions.

Nevertheless, they are more capricious than the “troika of winners”.

Fish suitable for beginners and young aquarists. The fishes most difficult to keep from all members of the family are demanding of their conditions, they do not tolerate low temperatures, some like “salty” water, like bright light, etc.

You can read more about MOLLINESIA here.

5th place Tetras – Harazinki

All tetras are small, brisk, not capricious fishes. However, they will not be able to survive in “Spartan conditions” as guppies.

They need aeration and filtration. You can keep them in an aquarium by a group (from 5 individuals) with a volume of at least 35 liters of water.

You can read more about TETRAH here.

6th place Ternetsii

Very famous little fish. Fish energetic, mobile.

Fish get along well with other types of fish. Somehow my terntions even lived with small cichlids.

Recommended aquarium with a volume of at least 30 liters of water, densely planted with plants. Aeration, filtration – yes!

You can read more about TERNIA here.

7th place Danio (rerio, pink)

Starting from the 5th place TOP, all the fish require unpretentious attention. Tanks are different from them – briskness and speed of movement.

They can coexist with many species of fish, even with fish of medium and increased aggression: scalar, goura and even with small cichlids.

Read more about DANIO here.

8th place Torakatum

One of the famous large catfish of the aquarium world and excellent attendants of the aquarium. Peaceable and unpretentious to the content.

They can be kept in a common aquarium with thickets of plants and a large number of shelters. Fish, do not pose any threat to other inhabitants of the aquarium. Compatible with all kinds of fish.

The neighbors are not recommended only one hundred percent aggressors and predators.

You can read more about TORAKATUM here.

9th place Gourami

Gourami – are medium sized fish. Entered in this TOP due to gill labyrinth – fish do not need aeration, they breathe atmospheric air.

Really peaceful fish, but sometimes aggression. Some individuals taken separately are even very aggressive, as they say, as lucky.

You can read more about GURAMs here.

10 place Barbus

Barbusses are schooling, small fish that can stand up for themselves! If you decide to start a barbus, I recommend to allocate for this a separate aquarium, “barbusyatnik.”

“Pirate” temper, the ability to stand up for themselves – deserve 10th place. You can read more about BARBUSH here.

Of course, the above TOP is conditional – always remember the words

Antoine Marie Jean-Baptiste Roger de Saint-Exupery

“We are responsible for those who have tamed”

We also recommend you to look at the colorful brochure “Popular types of aquarium fish”. This brochure contains all popular types of fish, with a description of their conditions of maintenance, compatibility, feeding + photos.

(to view or download, click on the image)

An interesting video about unpretentious and small aquarium fish

Additionally, we invite you to view a large photo collection of small and unpretentious aquarium fish

These aquarium fish are small in size, peaceful and cute, they need a lot of free space for swimming. Danio is a schooling and mobile fish that love oxygen-rich water and light. It is necessary to cover the aquarium, as danios are bouncy and can fly out of the aquarium.

Such types of danios such as rerio, pearl, pink, leopard are popular. Well side by side with small haracinov and labyrinth fish.

Fish from the cichl family are rather large and brightly colored inhabitants of aquariums. Most of their varieties are considered to be aggressive and fighting fish. But among them there are several representatives, differing more or less calm temper.

You only need to take into account their territorial nature and provide an aquarium with shelters for these fish.


In addition to these types of aquarium fish, there are many other equally interesting and peace-loving inhabitants of the aquatic world. The main thing is to create proper care for them and provide comfortable conditions.


Ctenopoma – aquarium representatives, combining beautiful colors with a peaceful character. Due to the peculiarities of the structure and color, the ctenopoma successfully disguises itself from the pursuit of predators.

Ctenopoma have a timid temper, hiding in the thickets and live in the lower layer of water.

Fish, like other living creatures, have a need for personal territory, which they carefully guard. Therefore, the larger the aquarium and the number of different shelters for pets in it, the freer and more comfortable the aquarium inhabitants will feel in it.

However, we should not forget that during the spawning period, even the most peaceful inhabitants of the aquarium, due to their natural inclinations, can desperately protect and show aggression, protecting their offspring, at such time they are better to be spawned.

Peace-loving fish in an aquarium will give their owner a relaxing effect and will give you inner peace. A person can be calm for the life of fish and the atmosphere in his aquarium due to the good nature of their pets.

The fish of ternation are distinguished both by their external attractiveness and by their calm temper. Ternetia has a silver color with black transverse stripes on the sides.

The fish reaches 4.5 cm in length. Compatible with small haracin, petillia and guppy.

It is not recommended to keep it with veil fish.

Deciding what kind of fish to start first in your tank can be sudden, and can be thought out. Unfortunately, novice aquarists are often guided by the very first impulse, completely without understanding the fish. And then, instead of joy and pleasure, they get a headache and problems.

You need to choose the fish wisely, because their life and your comfort depend on your choice. Before you go to the store or to the market, study all the available information about the fish that you liked.

What kind of fish is not worth buying for beginners, we have considered here. And the top 10 unusual fish here.

And in order to make it easier for you to navigate, we have compiled a list of the best aquarium fish for beginners and briefly described them. All of them are distinguished by unpretentiousness, tolerance to conditions in an aquarium, peaceful nature, livableness and modest size.

We hope that it will help make your choice easier!

Danio rerio is a small (up to 5-6 cm), elegant fish. For its small size, peaceful disposition and unpretentiousness, it has earned great popularity in aquarium.

Since this is a schooling fish, it is better to keep at least 5-6 individuals. The aquarium can be planted with plants, but it is important that the danios have free space for swimming near the surface, as this is a very mobile fish. If you are going to have a veil form, do not plant them with fish that may tear off fins, for example, with a Sumatran barbus.

The aquarium should be closed, as danios can jump out of the water.

Omnivorous, they eat any kind of feed – branded, live, frozen. It is better to feed them with flakes, as they pick up food from the surface of the water and they don’t collect them for a long time without sinking.

It is very easy to breed danios, for once the female lays from 200 to 500 eggs.

It is believed that these fish have a peaceful nature, but this is not entirely true. With the wrong settlement in the aquarium, a flock of barbs can show aggression towards their neighbors.

If the fish are disproportionate, do not converge with temperament, then conflicts cannot be avoided. Barbels can destroy small and sluggish fish in the general aquarium.

Even inside the pack there can be fights.

The barbs have a high swimming speed, their character is characterized by activity and mobility. They are always in search of someone or something, they often catch up with each other. These pets will delight the aquarist, who prefers playful pets.

Care and maintenance of them will not cause much trouble, for beginners lovers of home aquariums, barbel are also suitable. Large types of barbs can become competitors even for large inhabitants of the reservoir.

For example, they easily nibble on large cichlid fins, giant gouras, and goldfish.

More than 15 varieties of barbs are widespread in the aquarium business. All species combine similar body parameters: an elongated body, a bilobed tail, antennae over the upper jaw.

Females are much larger than males, they are distinguished by a rounded belly. Males are smaller and brighter in color.

Due to possible aggression, the content of all barbel is recommended in a spacious tank with thick plants. Benefit for the aquarium – collect the remnants of food from the bottom.

The maintenance of small-sized barbs is possible in aquariums with a capacity of 50 liters or more. Barbus easily adapt to different temperature ranges, able to transfer 17oS. The best water temperature for them is from 19 to 25 degrees.

Acceptable acidity: 6.5-7.5 pH, hardness – 4-10o. They love the “old” water, and fast flow, which will help to create aeration or pump.

Water filtration is required, as well as weekly replacement of 20% of water with fresh.

Watch a video with tips on keeping barbs.

Small varieties of barbs live in flocks of 5-7 individuals. Lifespan in captivity: 3-5 years. Larger species (shark, hazel-shaped, arulyus, filamentosis, osteobram and others) can live alone or in pairs, and live, respectively, longer – up to 10 years.

Care for small species is simple, for large ones is more difficult.

As the soil for aquariums with barbs, it is better to choose dark sand or gravel. On the background of dark soil color scales issued more brightly. Plants should be planted closely, leaving space in the central part of the tank for free swimming.

Plants can serve as shelters and scenery. It is not recommended to run a mustache into a Dutch aquarium – there the fish will quickly destroy the plants with fragile leaves and stalks, dig them together with the roots.

In the reservoir where the barbs live, you can plant stiff-leaved anubias, cryptocoryne, vallyseria, arrowhead, elodea, echinodorus. Also floating plants and mosses: Thai and Javanese moss, hornolisnik, perististiknik, nayas, moss fontinalis.

They will give shelter to small fishes, and floating types will shade a reservoir – too bright light frightens small fishes.

The aquarium should be closed with a lid. Caring for fish requires close attention – they are bouncy and easily fall on the floor even during feeding.

If you have a small aquarium (50-60 cm in length, up to 100 liters), then it may contain small species, the dimensions of which do not exceed 5 cm in length. It looks like this: yellow Barbus, oligolepis, pink barbel, Schubert fish, cherry Barbus, striped Barbus. There are also medium-sized species, they should be placed in more spacious containers: these are Sumatran barbs, fire barbs, black, gold, barilioids, bimaculatus, capital canus, eugrammus and others.

Their body sizes reach 7-8 cm.

For an aquarium more than 100 cm in length and with a volume of more than 200 liters large barbs will fit (15-30 cm in length). Caring for the Everett, Schwanenfeld barbs, red-cheeked, bream-like, Denison, shark ball will not be so simple, but some representatives of large barbel have a peaceful and friendly behavior, unlike their small counterparts.

Soil for the aquarium – an indispensable foundation for aquascape and biological balance. It has not only a decorative function, but also provides the soil for plants, is a biological filter that can not be replaced with something else.

In a newly launched tank, aquarium soil is a breeding ground for beneficial single-celled microorganisms. For this reason, the choice of soil for aquariums plays an important role for the harmonious functioning of all aquatic aquatic organisms.

The soil is improving the root system of plants, from it they absorb nutrients. In plants with a developed root system, there are large demands on the quality of the soil.

Aquarium primers also support organic water characteristics, for example, aquarium soil with limestone affects the hardness indicators of the aquatic environment.

Various materials can be used as primers for aquariums. A significant role is played by which substrate is suitable for plants and fish.

Decorative mounds and pumps are easily made from gravel. If you are seriously engaged in growing aquarium seedlings, first of all, you need to take care of the quality of the substrate.

The size of the gravel particles should not exceed 5 mm. Do not sprinkle fine sand on the bottom of the tank, which quickly deteriorates. Make sure that the soil does not change the organic parameters of the water, it is natural, without dyes.

If you need to increase the pH and hardness, lay on the bottom of the soil for aquarium with shell or marble chips.

Regardless of whether your soil is purchased or extracted from the natural environment, it must be processed. If you have purchased sand, it should be sifted through a sieve to remove small stones and other particles. Pebbles also had to be moved so that the entire substrate consisted of identical particles.

If you buy quality soil, then the cleaning procedure is not necessary.

New soil should be washed under running water. It is poured into a large container, poured with water, stirred, then the water must be drained.

It is necessary to rinse until the pollution is removed, it will take 10-15 minutes by the time. Apart from this method, you can put the primer in the oven for 10 minutes, and there it will heat up to the temperature that it will disinfect from parasites.

See tips on how to choose a primer for an aquarium.

How to choose a material for the soil substrate? All materials of which the ground for the aquarium is made can be clean or with admixtures of additives. Peat can be added to the sand or gravel, which improves the nutritional properties of the soil.

Peat perfectly holds elements such as anions and cations, pure gravel does not have this ability.

Sand and gravel as grounds for aquariums is a natural substrate that is also suitable for plants. The amount of fine gravel is from 2 to 5 mm, it has a low ability to retain nutrients. Good gravel secures the rhizomes of plants, put on peat.

Fine sand does not contain nutrients, absorbs them poorly, breaks gas exchange. It is better to use sand with other substrates (cake, rakushnyak, clay). If a bottom filter is installed in the tank, fine sand will clog the equipment with dirt particles.

It is better to use coarse river sand purchased from a reputable manufacturer. Do not choose sand saturated colors – yellow and red.

This substrate contains a large amount of iron, which is harmful to fish.

Aquarium clay soil – clay contains inorganic components, such as iron silicates and iron oxides. Some types of clay may have other components – copper, manganese, zinc, aluminum. They are required for plants, but in high concentrations have toxic properties.

A special property of clay is that it attracts positively charged ions of metals and salts. It also serves as an excellent fertilizer for vegetation.

Laterite is a tropical red earth consisting of iron dioxide. Laterite can be used as a bottom layer for soil.

It has a good ability to absorb nutrients.

Garden soil as soil for aquariums – garden soil contains many impurities. There is no guarantee that the land will be clean.

In the land of a large number of fertilizers, parasite cysts. It is saturated with nutrients, due to which the glass tank will quickly fill with algae.

The land used for pot plants has a lot of organic matter and peat, it can be mixed with gravel and sand as an additive.

Peat – needed to soften the water. It consists of a mixture of organic minerals that are in a rotten state.

Peat is added to aquariums, where plants and fish need humic acids. In small concentrations, boiled peat is practically harmless.

Artificial plastic granules – a new type of soil that can satisfy many aquarists. The granules are of different shades, but the rich color may be too contrasted against the background of the underwater aquascape. Remember that the substrate must be chosen closer to the natural color: gray, black, red-brown, white.

Fish with bright body color will look great on this background.

See how to care for quartz sand in an aquarium.

Grounds for aquariums should be laid in three layers:

  1. The bottom of the aquarium is lined with laterite or clay mixed with gravel (the thickness of the lower layer is from 3 to 5 cm). You can add clay balls to the laterite, which will provide nourishment for new, non-adapted plants. Cables for heating the bottom should be laid in a glass tank so that the glass is not injured. Do not lay the heating cable in a shallow clay or sand substrate to prevent overheating.
  2. The middle layer should be slightly thinner – 3 centimeters, the substrate – sand or gravel, which can be mixed with a small amount of boiled peat. The thickness of the middle layer is recommended to put balls of clay.
  3. The surface of the ball is lined with fine gravel mixed with sand, which prevents water turbidity. On the top layer you can put decorative stones or corals, shells (if necessary). If there are pets in the aquarium digging the ground (catfish, cichlids, snails), then the top layer should be an order of magnitude thicker (5 cm), or the soil should be planted in pots along with broadleaf plants.

On the shelves of stores sold fixture – a hose with a cylinder and a funnel at the end. The diameter of the hose should not contain the fish themselves, only garbage should pass into it. The device has the name “siphon”, it can be wrapped with gauze so that living creatures do not fall into it.

Siphon can remove food debris, waste products of pets, they can drain the soil and remove sludge. Properly selected siphon will only remove excess, without harm to vegetation.

Prepare a plastic bucket for excrement and uneaten food with old water. The difference between the siphon and the replacement of water is that the funnel should be lowered to the bottom of the aquarium almost every day, the ground itself due to its gravity does not fall into the hose, but it takes the dirt.

Water should be changed less often – once in 7 days.

Soil for the aquarium should be chosen such that it meets several requirements. The first – supported the physico-chemical processes in the water, the second – benefited the fish and plants, did not emit toxic impurities.

If you want to soften the water or increase its rigidity, choose the appropriate substrate. Hydrogen soil indicators should be acidic (7.0 pH), or pH neutral (5.5). The water gets tough when there are shells and corals in the bottom substrate.

Sometimes it can adversely affect the health of some pets. Properly process, clean the soil substrate, then in your tank will create a permanent biological balance.

When choosing inhabitants for a small aquarium, first of all, of course, one should pay attention to their size. Fish should not be more than 3-4 cm long, and if the aquarium is completely “nano”, up to 15 liters more than 2-3 cm. In addition, the fish need peaceful, not too voracious, not territorial and rather unpretentious, at least if this is your first experience in nano aquariums.

Well and, of course, they must be brightly and diversely colored and active, so that it would be interesting to watch them.

Under these conditions is quite a large number of fish. The most honorable place in nano aquariums is occupied by carp representatives – zebrafish, micro-assemblies, boraras.

The micro-collection of the galaxy with its amazing color is truly the queen of small volumes.

It is possible to lodge neon and tetra amanda from charicine fishes in such an aquarium, from guppies and petillia from viviparous. In addition, you can make small catfish, for example, the corridor-pygmy or otozinclus.

Feel good in a small volume of the cockerel.

Fish is better to take flocks of 3-4 pieces (of course, except for pugnacious cockerels), so they will feel more comfortable. The density of planting small fish should be about 1 individual per 2 liters of water.

In addition to fish, different types of shrimp live in a nano aquarium, dwarf crayfish (they are incompatible with shrimps), frogs hymeno-viruses.

Aquarium frogs: care, species, content with fish

Consider the two most common types of frogs, which are kept together with aquarium fish. The main emphasis, of course, needs to be made on the conditions of detention and to reveal the pros and cons of living together with the fish.

Spur Frog (Xenopus laevis)

Albino Spur Frog

More common view

In general, we can say that they are unpretentious in all respects, except for food. Yes, and feeding is not a heavy burden.

This view is enough 10 liters per individual. Comfortable water temperature 18-22 degrees.

You can keep at 24-26 degrees, but the life expectancy at the same time is reduced. The maximum body size is 8 cm, so, in any case, the handbook writes.

In practice, the owners of these slippery creatures proudly present to the public 16 inches.

To equip a Spurts frog house, a filter is needed that is powerful enough to cope with the volume of dirt produced by these quicksands. But at the same time, the filter should not produce strong streams, as in their natural habitat, these frogs live in stagnant shallow water bodies.

And of course the aquarium should be closed with a special lid or glass with a gap for air intake, otherwise the whole house will become the frog’s house, they can easily get out into the wild.

The frog’s diet consists mainly of animal feed, such as small bloodworm, daphnia, small earthworms, and rags of lean meat. But the most important feeding rule is not to overfeed.

Frogs are very voracious. Obesity is one of the most common problems of this type.

It is enough to feed an adult frog 2 times a week, younger individuals eat more often, 4-5 times a week, in small portions. What is remarkable these frogs are eating with their hands.

Quickly turning over the paws, they push the food to the mouth.

And although the frog is a predator, it peacefully coexists with fish, which will be comfortable with the conditions prescribed by the Sporez frog. We divide the idea of ​​keeping a frog in an aquarium into pros and cons.


– looks very interesting in the aquarium;


– eats small fish. Such species of fish as neons or guppies will not live long in the aquarium with the Spitz frog.

– dirty. Besides the fact that they openly and a lot of shit, the Spurs frogs themselves are very actively digging up the ground, lifting from the bottom all that others have covertly spoiled.

The situation can be saved by abundant filtration and frequent use of a vacuum cleaner.

– tear out, break and bite the plants. For them, only hard-leaved plants planted in pots, and not in the ground. If the plant is planted in the ground, then they dig it out and gnaw the roots.

Just out of harm, because in general they are not interested in plant foods.

– in the mating season they “sing serenades”

Frog Himenohirus

A less common type of frog, compared with the famous Shportseva, but rather attractive. These are miniature reptiles, the adult individual of which reaches a maximum of 6 cm. In length, it grows up to 4 cm.

Externally quite different from the Shportsevs. Hymenohirus in this comparison can be called “slim.”

They have thinner legs, a body that is less rounded and less puffy in shape, and a pointed cute face.

In their natural habitat, these frogs live practically in puddles. From here their preferences in content are added.

They naturally do not require a large aquarium, they can live comfortably in a five-liter jar. Aeration, as in the case of the Shportsevoy frog, is not required. Filtration may be present, but not powerful and does not create water flows (preferably with the release of water through a waterfall).

In any case, the stagnant angle in the aquarium should be, especially for her. Comfortable water temperature of 24-26 degrees, these are thermophilic frogs. Water changes are not recommended.

And frequent substitution can ruin the hymeno-virus in all.

To feed the frog you need a crank, daphnia, pipemaker. But it is worth noting that to teach them to eat a fixed frozen food is quite difficult, since they are predators and react to the movement of food.

The frequency of serving food – every other day.

Like spider frogs, hymeno-virus is a bandit on parts of plants and soil. But, yet this species is not so polluting, because they are much smaller.

They are also slower and shy, in a tank you need a secluded place where they can hide.

With unpretentious fish can live and live. Every year they are becoming more popular in common aquariums.

But, all the same, there are downsides and pros. Pros:Midyllic and cute;
ATbetter suited for a lazy aquarist;
Minuses:HThe required water quality. This frog species likes to live in a creative mess.

You can not strongly filter, you can not change the water, and these conditions are necessary for the maintenance of the majority of aquarium fish. And just like Shportsevaya, Hymeno-Virus loves to dig up the ground, lifting high-high all the secrets hidden there by more shy and ambitious inhabitants of the aquarium. – EIf there is a fish in your aquarium that is smaller than the mouth of this frog, then from the moment you have a Hymenorus, you can assume that you do not have such a fish.

This is also a predator. –UhThat is not a very active frog. Most of the day they spend without moving, then sitting at the bottom, then hanging in the water.

Having seen enough of the people who are wildly floating in the pet store, the buyer probably dreams of a frog show in his aquarium. But, this is deceptive.

Hymenochoruses move so fast because there are a lot of them and it scares them. In a calm atmosphere, they are quiet.

Can move quickly when feeding.

FINDINGS: Frogs are quite frequent neighbors of aquarium fish. They can live together. But the same can be said about a person, if he is hooked, for example, to an ass, or vice versa.

They will be able to live together, but whether they will be comfortable, convenient, pleasant … It is unlikely. If you are seriously thinking about buying a frog with an already existing fish tank, think carefully, and can your fish live comfortably with infrequent water changes? Will it be enough for them to filter with intensive pollution?

Someone might say: “Well, the Spur Frog lives with a filter that should work like a rabid to cope with its disorder.” But, ask other questions: Will the fish like the lack of water flow in the aquarium?

Will a huge frog fit in your abode of underwater beauty? If so, great!

In view of the above, we can recommend a certain family of aquarium fish that will best survive with the frogs – THIS IS LABYRINTH. These include:

Habitat of the above fish (except for Ktenop), are rice fields of Asia, which are poorly enriched with oxygen, the water on such fields is standing and dirty. That is why the labyrinths have learned to breathe atmospheric air and they like
“Old water”.
FanFishka.ru thanks

the author of the article – Jan Terekhov,
for the provided material and cooperation!

О admin


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Gourami dwarf or Pumila (Trichopsis pumila) – the tiniest member of the labyrinth family. In ...

Mastamembel Armatus (Mastacembelus armatus) – content, breeding

Mastamembel Armatus (Mastacembelus armatus) Lacepède, 1800 Other names: Mustambell Carapace, Coffee Eel. Family: Hobotnorylye (Mastacembelidae). ...

Glowing fish GloFish – types, description, content

Varieties of glowing aquarium fish with a common designation – GloFish. Glofish – patented name ...

Tsichlazoma Severum (Heros efasciatus) – content, breeding

Cychlasoma Severum (Heros efasciatus) Heckel, 1840 Family: Cichlids (Cichlidae) Other names / Synonyms: Severum, Severum ...

Gastromizon (Gastromyzon punctulatus) – content, breeding

Gastromizon (Gastromyzon punctulatus) is a small and calm fish that can be more and more ...