Paku fish, herbivorous piranha is a freshwater fish of the piranya family. In nature, found in the Amazon and Orinoco, standing and flowing waters of their pools.
In the European classification is present from the beginning of the XIX century.
The object of fish farming and fishing. Contained in aquariums. There are also in the natural waters of North America and Asia, where they are considered harmful, displacing the aboriginal fish.
Divorced in nurseries around the world.
Fish pacu conditionally herbivores. Juveniles feed on small crustaceans, gastropods and washed away rain into the water by insects. An adult prefers plant food.
Can crush nuts.
Natural enemies – local dolphins and crocodiles.
Representatives of piranha pacu are similar in constitution and lifestyle.
Body shape – ellipse, compressed from the sides to the disk. Anal and dorsal fins quadrangular, tapering to tail. Anal elongated to the tail.
Caudal fin bifurcated. The scales are small, with a silver sheen.
The eyes are large, mobile. The mouth is large, oriented forward.
Teeth quadrangular, similar in structure to native human ones.
- In the aquarium, keep aloof. Form pairs at the time of spawning.
- Leisurely, but active during feeding.
- Eat plants, including hard-leaved ones.
- They do not show predatory habits, but they will swallow a faint-looking fish.
- Shy, afraid of sudden movements and loud sounds.
The oldest mined in nature – 28 years. In captivity – 12-15 years.
The differences between piranha paku and red piranha
- Color is like a trifle.
- The teeth of the predatory piranha look like spikes. The peculiarity of the bite is externally expressed in the characteristic protruding lower jaw.
- Piranha red pacu twice as big. One-year-old pacu corresponds to the size of adult predatory piranha.
- Red piranha is a pronounced schooling fish.
Red pacu and black pacu are common in aquariums.
He is a brown pacu (Colossoma nigripinne, Piaractus macropomum). The name “Piaractus macropomus” is incorrect.
The abundance of Latin names is due to the selection of the previously brown paca in a separate species.
The dominant color is from gray to black. Belly light.
In some cases, the front part of the abdomen and the lower jaw with a pink hue.
The maximum body length in nature is up to 1.08 m with a weight of 40 kg. Typical size – 70 cm.
In the aquarium does not grow. Depends on the volume of the vessel.
They call Piaractus brachypomum, the red-bellied paku or the bicuspid colossom (Colossoma bidens).
The dominant color is darker. Tail fin with a vertical dark stripe. Bottom of gill covers, lower jaw and abdomen to red / orange shade.
The pectoral and anal fins are red / orange.
The largest captured specimen was 0.88 m in length. Weight – 25 kg.
The main problem of maintenance is the size of the aquarium fish. Adapts to changing conditions.
The conditions of black and red pacu are similar.
Flow in the aquarium are welcome.
Piranha is a shy, nervous fish. Confidence feels in the company of 3-4 relatives.
For an adult individual needs a capacity of 1.5 cubic meters. The approximate size of the aquarium (W xHxH) is 2000 x 750 x 1000 mm.
In a species aquarium – from 0.8 m3 per individual.
As a soil, use pebbles with fragments of 1–2 cm or a sandy substrate. Harmoniously pacu fish looks on a light background.
She eats living plants, and tries to try artificial ones. As shelters hang snags, massive stones, rocks.
- Temperature: 24–27 ° C. You will need a heater with a thermostat with a capacity of 1 W per 1 liter of capacity.
- Stiffness: 1–5 ° W.
- Acidity: pH 5–7.5.
In a plant-free vessel, intensive purging with air and filtration are necessary. Compressor with a capacity of 1 liter of air per liter of water per hour.
External filter, pumping 5–8 vessel volumes per hour.
Replace weekly from 1/4 of the volume of water to the settled. Remove food residues and waste products from the ground.
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Standard luminous flux: 40–60 lumens per 1 liter of water. Use fluorescent and LED lamps with a color temperature of 5000K.
They differ in maximum light output, without the thermal component in the radiation.
Light day – 10-12 hours.
Eats a lot, is omnivorous, but 70% of the diet of a pacu is plant food.
Give vegetables, cereals. Suitable greens, fruits, berries.
Do not chop the feed. Herbivorous piranha copes with inshell nuts.
It is enough to cut into pieces creeping into his mouth.
As a feed use live food (bloodworm, koretra), frozen and dry food. Eats fish fillet, beef.
Be careful with meat: the character of the fish deteriorates.
Feed 1-2 times a day. Weekly – fasting day.
Paku is a unique fish. In the aquarium – the only one without any problems adjacent to the predatory piranhas.
Gets along with all the fish that are suitable for the composition of the water. Small eats.
Sexual dimorphism is weak. Females overall, with a swollen abdomen.
Breeding in captivity is problematic. Young individuals come to the stores from nurseries.
For spawning use hormonal injections. Parents do not care about caviar, fry eat.
Fry need constant sorting. Developed individuals are prone to cannibalism.
They feed up daphnia, artemia. Vegetable food – phytoplankton, large algae.
In nurseries give artificial food.
Sexual maturity reaches 12–20 months.
Aquarists praise the herbivore piranha for calm behavior, eating any food with appetite. When you hit the glass, when you turn on the light or in the case of sudden movements outside the aquarium, the fish starts to panic.
|The size||Price (₽)|
|Up to 7 cm||500|
|Up to 15 cm||1500|
|Up to 25 cm||5000|
Piranha paku – large calm leisurely fish. Does not offend the neighbors. Unpretentious content.
Herbivorous, but possesses the exterior of a predatory relative.