Fishism

Specism/Racism against Fish. Includes Fish people (mermaids, tritons) as well as sea life.
A Fish racist is called a Fishist. Some Fishermen are Fishists, and some are not.
Political discussion about whether fish should be considered people or not is open for debate.

Person 1: Is fishing a hate crime?
Person 2: No, because thankfully no place recognises fish as real people.
Person 1: Bro, that's Fishism.