Walking Flounder

Walking Flounder turns up in the margins of Futurama's twisty future, one more absurd bit of background life doing something a flounder has no business doing. The joke is entirely in the premise: a flat fish, upright, going about its day as if nobody told it that wasn't possible.

Futurama's best throwaway gags work because they're delivered with total deadpan commitment, and Billy West — already juggling half the cast — gives even a walking fish a specific, lived-in voice instead of a shrug. It's the kind of blink-and-you-miss-it creation that rewards rewatching a world built to be crowded with them.