Curious about what The Angler's reputation pet will look like? MMO-Champion has a nice screenshot of the Tiny Goldfish. 'Cept it doesn't look all that tiny to me! :P
Note: The Tiny Goldfish should not be confused with Fishy, even if they have similar models. From what I can tell so far, they are two completely different pets.
The latter companion is a BoP reward from the quest Let Them Burn, while the former is from a reputation vendor and is BoU but requires honored rep with The Anglers faction.