Ever since the Arlong Park, I've been wondering: How many types of Fish-men are there? as many as the sea? or even more, since fish-men have to breed, so are there a bunch of half-shark, half-octopus dudes out there?
So I've made an interesting idea: create your own fish-man type! Think of a species of aquatic creature you would like to turn One Piece. No need to cross-breed, just name at least one type that hasn't been seen during the whole One Piece series.
Species that have already been used:
Whale shark--Jimbei no Shichibukai
I think that's all. If I missed any, please tell me so that I may correct my mistake. Have fun!