I think I would have to go with my valentini puffer. He is so adorable, hovering here and there. Not afraid of anything, his gorgeous green eyes independently twitching this way and that. His little tail delicately held out to the side... so cute! I love the way he appears to hover like a little helicopter, not like other fish who have to paddle to swim. Those little fins on the tops and sides almost imperceptibly twirling around... So fun! I love when he sleeps... he just clings precariously to a wall and just lays perfectly still, oblivious to the world around him! Sometimes he picks spots to sleep that amaze me that he doesn't just fall backwards and plummet to the ground..