LOL!!!!!!
I take it you are not into fish aquariums ...
Being female, artistic, an animal lover, and I really like fish, I kinda thought a fish based race/ shipset would be unique, visually appeasing (depending on the fish type of course. There are some really cool and mean looking deep sea fish that live so deep in the sea there is no light. Ship sets based on these creatures would be sure to evoke terror in other races), and kinda cool.
And as Atrocities pointed out, a fish race would open up new enterprising options. Just think of the possibilities ..... :}
Edited: I have a ttached a fish pic. Can't you see a cool ship based on this design? Would it not look scary coming at ya?