A World of Nothing But Shrimp

Anya: "Oh ok. Umm. Say you really like shrimp a lot. Or we could say you don't like shrimp at all. 'Blah I wish there weren't any shrimp you would say to yourself.'"
Buffy: "Stop you're saying it wrong! I think that Jonathan may be doing something so that he's manipulating the world and we're all like his pawns."
Anya: "Or prawns."
Buffy: "Stop with the shrimp I am trying to do something here!"
-Buffy the Vampire Slayer, 4.17 Superstar

A world made entirely of shrimp. That means that you could have shrimp, that swim in seas of microscopic shrimp, who are composed of cells and atoms shaped like shrimp. Then you could bigger shrimp, that breath shrimp, and are eaten by shrimp that make Jaws look small...

...or a world with shrimp that walk on two legs, and wear clothing made of shrimp, and have biotech designed from shrimp...

...and now I'm just going to have nightmares...