<a href=showthread.php?s=&postid=12959058#post12959058 target=_blank>Originally posted</a> by michael_cb_125
I agree with Brian, plus always remember that each fish is an individual.
I have had Big maroon Clowns that were big babies, and not aggressive in the least. And I have had Blennies that were just mean.
I think that by taking a fish out of the sea and sticking it in a big glass box, we are automatically increasing their aggression levels. In the big ocean they have plenty of room, in a small tank they "need" to care about space, so they are more aggressive.
~Michael