Cichlid

[Gregory]

The best family of [fish] in the world. Very intelligent for fish as well. Most are highly agressive and [territorial]. They will even kill [piranha] to protect their young.

[Vania]

A freshwater fish of a family (Cichlidae) that is widely distributed in tropical countries. Cichlids provide a valuable source of food in some areas, and many are popular in aquariums.