An omnivore who excludes poultry, beef, and pork from their diet but includes fish (and usually other forms of seafood like shrimp, oysters, scallops, etc.).
Because these people do choose to include meat in their diet (seafood is muscle tissue from a live animal and therefore meat), they are not vegetarian as vegetarians do not consume meat.

someone who doesn't eat meat, but does eat fish

a type of vegetarian that allows fish into their diet.

also known as pescovegetarian

A vegitarian who eats no other meat but fish.

A wannabe vegetarian who takes great self-pride in being a vegetarian, but still eats fish and other seafood (i.e. meat).

a person who has a vegetarian diet, but who also adds fish and seafood to their diet

Cheaters. They claim they're vegetarian even though they eat fish, even though fish is an animal and has flesh just like any other animal.

Some pescetarians often eat small amounts of chicken and sometimes beef, then deny it ever happened or say that it "doesn't count."