Hi folks,
I stumbled upon this huge database for fish,
FishBase.org.
As of writing this they claim to cover 33300 Species, 318500 Common names, 57400 Pictures, 53000 References, 2250 Collaborators, 700000 Visits/Month.
Thought this might help some of the folks in the fish forum... Oh, and the stuff is CC-licensed a well... nice
Grüße aus Deutschland, Tobi