*Squeals at topic*
I have no idea where to start, so here's just a few random favorites off the top of my head.
Probably my most favorite, a Queen Angel:
www.geocities.com/willix/images/Angel.jpg
Cute puffer fish (one inflated, one deflated--to show the cuteness of their faces):
http://employees.csbsju.edu/hjakubow...pufferfish.jpg
http://www.space.net.au/~uec/dj%20-%20puffer%20fish.jpg
Seahorse:
http://www.aquariumfishpictures.com/...seahorse01.jpg
And a betta. Out of all the fish I've owned, this kind as lived the longest:
http://www.save1004.com/bettafishred2.jpg