Chinese name: South American toothfish Scientific name: Hoplias malabaricus English name: tiger tetra Distribution: Central and South America, river basins from Costa Rica to Argentina Body length: 50cm Most toothfish are benthic/nocturnal/carnivorous Suitable temperature for sex is 22-28, PH 6-8. The feeding method of adult fish is basically to wait for a surprise attack. Young fish and sub-adult fish will attack to catch food. It is not easy to breed in polyculture. When cleaning the fish tank, be careful not to get too close to it. The South American toothfish family is a member of the Galacine family. When I first saw this fish, I thought it was ugly and ferocious, but when I tasted it carefully, it turned out to be a very tasteful large fish. The ancient, fierce and primitive appearance not only reminds people of dinosaurs and other prehistoric beasts, but its strong personality also lives up to the nickname "wolf fish".