Whoops! Maybe you were looking for Hans Krebs?

Origin: Shakespeare had a fish, and he named it Hamlet. Ii died, so he wrote a poem about him.

He was real fun, although he stank, and though he peed where he drank.

He heard the plays, but as I wrote, To the top his corpse did float.

He loved Romeo and Juliette. But he was a very short lived pet.

He was nice and never mean, Than I flushed him down the latrine.