Many organisms live in the ocean environment. The greatest species diversity is observed among the fish of the ocean: there are peace-loving herbivores living in flocks and bloodthirsty predators that can threaten all living things.
There are both very large and extremely small individuals, but they are all interesting in their own way.
The underwater world of the ocean is filled with a huge number of diverse individuals.
Sharks are the most colorful inhabitants of the depths of the seas and oceans. They are occasionally found in large lakes and rivers.
There are more than 500 varieties. They differ from each other not only in appearance and form, but also in lifestyle.
Eight families are included in the most numerous detachment of kharharinoobrazny:
- baleen dogs;
- false falcons;
- striped cat;
The largest detachment of sharks – karharinoobraznye, almost any shark that comes to mind will be from this squad
They usually live in coastal sea regions of temperate and tropical latitudes. Their common features are:
- five gill slits;
- anal fin;
- two dorsal fins.
- flashing membrane on the eyes.
Tiger shark was so named because of the transverse stripes on the sides of the body. This is one of the most common varieties.
Individuals grow to six meters in length, while reaching one and a half tons of mass. Indiscriminate in food. It uses crustaceans, turtles, does not hesitate to sharks of another species, likes to eat marine mammals, birds, sea snakes and fish.
Sometimes accidentally swallows unsuitable for food items. It represents a threat to humans.
Obviously because of what the tiger shark got such a name, unpretentious in food and represents a real threat to humans
The name of the lemon shark is associated with the yellowish tint of its skin. The length of individuals reaches a size of three and a half meters and a weight of 200 kilograms. Active at night, live in shallow bays and reefs, can settle in medium.
Young sharks gather in flocks and swim along the coasts overgrown with mangroves. They usually hunt birds, fish and mollusks.
Cases of attack are recorded extremely rarely, but this species is still potentially dangerous to humans.
The stupid shark is so named because of the short and massive blunt snout. It is considered one of the most dangerous, it is a real threat to human life. The shark lives in freshwater bodies and behaves extremely aggressively, often attacking livestock and domestic animals entering the river.
Moreover, their physical parameters are quite impressive – half a ton of weight with a length of four meters.
A stupid shark or bull shark is also a danger to humans.
The diet includes sea turtles, fish, smaller sharks, mammals, echinoderms and crustaceans. They hunt, lurking in the muddy water, which perfectly masks the predator, without giving it away.
Predator attacks many people, not expecting danger.
The side fins of the long-winged (long-fin) shark visually resemble the wings of an airplane. The greatest known length of an individual is four meters.
Weight reaches 200 kilograms. They feed on clams and bony fishes, but due to hunger they can change their taste habits.
Not safe for humans.
The blue shark is very elongated and slender, the pectoral fins stand out for their length. The top of the body is blue, on the sides it smoothly turns into blue, and the belly is contrastingly white. With a length of four meters, the predator weighs relatively much – 400 kilograms.
Prefers to hunt crustaceans, fish, octopus and squid, does not neglect the corpses of mammals. Unsafe for humans.
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The silk shark’s body is relatively soft due to the small teeth on the skin. The sides are bronze-gray, in places they are cast in metal, the abdomen is light. With a length of three to four meters weighs about 350 kilograms.
This species is distinguished by its particularly acute hearing, which they use for hunting. Most of the diet is fish.
Sometimes sharks gather together and drive the victims to a large flock, and then they attack. Cases of attacks on people are not recorded.
The reef shark is also called the Whitefin. This is due to the tips of its fins – they are painted white.
It lives in places where there are a lot of corals. Well adapted to the reef terrain, well oriented and hunts in it. Able to extract potential food from narrow spaces.
It has a fairly strong jaw to break corals.
Goes hunting at night, usually catches lobsters, octopuses, crabs and reef fish. With a two-meter length, it weighs quite a bit – only 30 kilograms. Individuals are aggressive towards humans only in the case of self-defense.
If you do not provoke a reef shark, then it will not attack people.
Reef sharks can be distinguished by their small size and colored fin tips.
The cat shark has an interesting spotty color. It got its name also because of its excellent vision, nocturnal lifestyle and ability to roll up into a ball.
The body of a shark is small, it does not grow longer than a meter, it weighs no more than two kilograms. Specimens catch gastropods, mollusks, crustaceans and echinoderms.
Not dangerous to humans.
The cunha shark was also named because of the similarities with the mammal. It looks like a marten, as well as a small, flexible body. This predator is very agile and brisk, shows gluttony.
The sizes vary greatly in the range from 30 to 220 centimeters, large individuals weigh 30 kilograms. It hunts usually for fish, less often for mollusks and crustaceans.
Almost not dangerous for humans.
The hammerhead shark is well known for its unusual head shape. In the daytime, individuals often gather in large flocks, the numerical size of which can reach thousands. The greatest recorded length is 6 meters.
Weight does not exceed 600 kilograms. It usually feeds on stingrays, fishes and mollusks.
During the hunt shows aggression, therefore dangerous to humans.
Hammerhead shark is dangerous for humans only when hunting for habitual food of stingrays and smaller fish species.
The origin of the name of the soup shark is directly related to gastronomy. Predator’s large fins are considered a delicacy and are used to make exotic soup.
In length it grows up to two meters, but it weighs only 50 kilograms. Eats squid, crustaceans, mollusks and fish.
Due to the relatively small size is not very dangerous for humans.
There are other large groups of sharks:
There are several other classes of large sharks, among them
Zebra fish has an interesting beautiful color. A part of the snout from the mouth to the eyes is decorated with a small black ornament resembling freckles.
From the eye to the caudal fin there is a black stripe, which is divided into two in the middle and is combined again. The tail fin is yellow, but has a black border.
On the edge of the lateral fins there is a yellow stripe, and the dorsal and ventral fins are black. The body is painted in a pleasant shade of blue.
This fish is quite small and is used in aquarism, as it can be kept at home. In nature, it is found both in small groups and individually.
The fish is peaceful and curious, constantly exploring the reef bottom in search of algae, in the same way behaves in the aquarium. It prefers places with bright light, as it guarantees the growth of cyanobacteria.
Clownfish live in symbiosis with anemones – poisonous sea anemone. The body has an interesting color: on a bright orange background there are three white stripes, the transitional parts are black. The fish are immune to poisonous secretions of anemones.
In nature, they hide in them from predators. When the flock is not threatened, the fish actively swim and increase the flow of water that brings food to the sea anemone.
The fish is small, only 10−18 centimeters in length.
Guban-pajamas – this is a very fastidious fish with an interesting color. Aggressive attitude towards relatives from the same family for her norm.
Likes to terrorize neighbors, harming them psychologically and physically. It feeds on algae, gets along well in the marine aquarium.
It is necessary to settle in a spacious tank, where there is both free space for swimming and shelter. You can feed the plant food.
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