There isn't a Creatu page anymore. A lot of people found it pretty annoying back in May, but the only way to really look at all your pets is through your profile. I s'pose you can also see all of them on the stock pets page of your show room if you set one up, but no details there.
If you mean sell, you could probably do some advertising on the advertisements board, perhaps the Shoutbox if you can get on there, and sell it with the use of pet trades and whatnot. If you mean actually just getting rid of it, the Atqueen Forest on Atquati could work. ;o