can vegetarians eat fish?

Isn't that called a pescetarian or something? ( ͡° ᴥ ͡ °)

Yes they can / vegans on the other hand eat only plant derived food no animals at all nor their byproducts

Apparently they are animals, but not meat.

If they have a mouth, a belly and an asshole.

You're referring to pescatarians

Some do some dont

you're kidding? right?

some do