Chinese name: piranha
Common names: piranha, piranha
English name: Spotted Piranha,Redeye piranha
Scientific name (Latin name): Serrasalmus rhombeus
Other scientific names: Salmo Rhombus, Serrasalmus Niger, Serrasalmo Immaculatus, Serrasalmus Paraense, Serrasalmo Paraense, Serrasalmo Humeralis Gracilior, Serrasalmus boekeri, Serrasalmus normani, Pygocentrus normani
Origin: Amazon River, Guyana, Venezuela and other places.
Feeding habits: the bait is mainly animal feed such as small fish and meat pieces.
Habit: body length is 20~30 cm. The body is oval, wide and flat. The main tone of the whole body color is gray-green, the back is dark green, and the abdomen is red. Have sharp teeth. Violent temperament, can not be mixed with other species of fish. Feeding water temperature is 20~30℃, and weak acidic water is preferred.
Reproduction: The sexual maturity age of parent fish is 18 months. The male fish is brightly colored; Abdominal hypertrophy of female fish. The breeding water temperature is 26℃, and the water quality is weakly acidic and soft. The bottom of the 100 cm X50 cm X40 cm fish tank is covered with snapdragon or planted with aquatic plants, and a pair of parent fish can lay eggs in 2-3 days. Male fish have the habit of protecting eggs, so they can be left to look after their eggs. It takes about four days for fertilized eggs to hatch larvae, and the males can be fished out when the larvae swim. Female fish lay 2000~4000 eggs at a time.
Others: "Man-eating Pomfret" is a general term for a class of fishes in the Amazon River in South America, which is also translated as Piranha. Not a particular fish, but a group, including nearly 30 species. It belongs to the subfamily Cyprinidae, which can be divided into two types: phytophagous and carnivorous according to their different feeding habits and living habits. The commonly said piranha refers to the carnivorous red-bellied sawfish fat carp (nattereri) in this subfamily. The fish is 30 cm long (excluding the tail fin). It is mainly distributed in the rivers in the Brazilian plain from the east to the Andes. Besides Amazon River, Cuyaba River and Orinoco River are also its main producing areas. The colors are slightly different in different reaches. 10 ——15cm healthy individuals, with blue-gray to brown-gray back and reddish to blood-red abdomen. They are the most common species of man-eating pomfret, and their intensive foraging behavior makes them an excellent ethnic group in the Amazon River.
Red fin pomfret is a close relative of cannibal pomfret, which is used by unscrupulous traders in the market to make huge profits. These vendors use its shape similar to that of piranha to confuse people's vision. These two kinds of fish are almost identical in the juvenile period, but the lower jaw of piranha is more developed and the biting angle is larger. Red-fin pomfret, also known as freshwater pomfret, is a popular variety introduced from Brazil in 1980s. It can reach more than 60 cm in length and belongs to the herbivorous species in the piranha family. There are two rows of teeth in the mouth of red-fin pomfret, the first row is12-14. 2 in the second row. The teeth are blunt triangular and parallel after the upper and lower palates are closed. There are 28-3/kloc-0 teeth in the mouth of the man-eating pomfret, and the teeth are in a sharp triangular sawtooth shape, and the upper and lower palates are staggered after closing. The market price of red fin pomfret (juvenile fish) is 0 each. 20 yuan, while the piranha larvae are at least 80-150 yuan. Rare varieties, such as violets, cost around 10,000 yuan. There are not many real piranhas among ordinary people, because they are not very beautiful and expensive. Unless you are a professional player with special hobbies, you really like their wildness.
Among more than 30 species of piranha, they are divided into two genera: pointed and round, and only a few species are more aggressive. Such as red belly (also known as Kabala, sawfish carp), black spot red belly, yellow belly, rouge and so on. Among them, the rouge water tiger is the most fierce, and it has the reputation of the king of water tigers. Its body length can reach 60 cm, and few people in China can identify it clearly. Man-eating pomfret has a very high IQ, and will attack its prey's tail and eyes first when preying. When it can't swim, it will rush to share its prey. Even large animals will attack the shoulders first, because they are the weakest. But the piranha is clumsy and can't swim fast. Scientists believe that the discus-shaped posture is a sign of their mutual recognition. Man-eating pomfrets also have a unique temperament, that is, they are only fierce when they are in groups. Once you leave the group or have a small number, you will become very timid. If they are not hungry, they will not attack even if they put their hands into water. Even huddled in the corner. Of course, if you have a wound on your hand, that's another matter. Appreciating the charm of piranha ... often doesn't stop at its unique appearance ... its ability of communication and cooperation among groups will be more intriguing ... and you can learn some eternal wisdom of nature!