A Wild Lurker Appears! Hyoi's Random Banter #232

[Peelee]

There's plenty of real life fish that have to be prepared special ways before they're edible.

Unless there's a pokedex entry, or something in another canon source somewhere saying they're inedible, they're probably eaten.

This is why worldbuilding stuff should always be entirely figured out before the story ever hits shelves.

Their pokedex entry in Silver seems to indicate they are eaten:

For no reason, it jumps and splashes about, making it easy for predators like Pidgeotto to catch it mid-jump.