Manguenese (sp) cichlid it sounds like- they have the color kind of like a smallie, but their teeth are cichlid like, little pokers, not fangs- I had a pair, the male got pretty big, over 12" and shaped like a fat crappie or tall bass, lol- Maybe one of these critters? These are South American cichlids, cool fish- I was diving in Lake Mission Viejo (oops, sorry, didn't know it was illegal! :) )and saw a nice fat pacu, but they are easy to identify, and cool fish, they do grow very large in the right environment.