Vicious Goldfish

Crimtane goldfish are a type of Goldfish found only in the Crimson (it is also the equivalent of Corrupt Goldfish) With Corrupted Goldfish, they are the only type of attacking goldfish in Terraria.

Any regular Goldfish nearby just before a Blood Moon will be transformed into a Crimtane Goldfish if your world contains Crimson.

History
Poisson Doré Cramoisi