I have one like that! Daffodil will lay on the sand at bottom of his tank, fins spread out as if he were sunbathing! My kids will start poking at the tank and scream "he's dead!" I go toward the tank and he pops up and swims to the front as if a movie director just yelled "cut" at the end of filming his death scene!
Aw! My roommates were apparently coming up with a plot to cover up their murder by "negligence" by running to a ghetto pet store near us that stays open late in order to replace him, but then at some point, Loki decided to float at a different corner of his bowl, relieving the roommates of the pressure of murdering my baby.