Kif Kroker

Kif is from the planet Amphibios 9, and has no bones; instead, he is supported by a system of fluid-filled bladders. He is a leutenant in the Democratic Order Of Planets, assigned to assist Zapp Brannigan on board the Nimbus. He is unagressive by nature, and often knuckles under to even Zapp’s most humiliating demands.

Since the males of his species are the ones who carry children, Kif once became accidentally impregnated with Leela’s DNA when he was in a romantic “receptive phase” with Amy, only to be exposed to several other people when the hologram system malfunctioned.