Thanks guys! Well, i have 3 sunfish and 2 of which were caught by a friend who is a fish biologist and an expert fisherman.. B) The sunfish are in 30 gallon (long) right now but im planning to transfer them to my 55 gallon once I get the right 55 gallon stand. And yeah, i think they are called red ear sunfish, I dont know about the other names. I also noticed that the other sunfish which is hiding in the first pic (as always) has different scales compared to the two that you guys see on the pic. Both of these are more aggressive than the other one. Oh yea, the fish were caught in some lakes in Ontario. And, i guess they are cold blooded..I haven't really researched much about the sunfish.
anyway, thanks for the nice comments..