Really cute, although i wished it had a few more slight star wars twists to it, like some darth vader-ish buttons on the helmet or suit and maybe some Princess Leia buns on one of the fishies.
i disagree with FA — as a non-Star Wars fan, any more references would put me off completely, so I think you struck a good balance.
this is really great-looking. my only quibble is with the way the air lines truncate; it might be nicer for them to fade away organically. still, that's a minor nitpick.
About my design