Pesca-pescetarian

A person that does not eat any meat apart from fish that eat fish.
A diet that is mostly vegetarian but allows only the consumption of fish that eat other fish.

Waiter: Here is your fish sir.
Pesca-pescetarian: I'm sorry , this is not a cannibal fish. You see, I'm a pesca-pescetarian.

Waiter: My apologies, I will see what options are available.

Pesca-pescetarian by Bobby Billy BoB November 8, 2016

Pesca-pescatarian 

Making a vow to not eat any meat – only fish that eat other fish. (Also any non-meat product).

"Wow, Julian is so brave! He just became a pesca-pescatarian! He can only eat fish that eat other fish!"

Pesca-pescatarian by Bbygrill September 19, 2017