Mean Fish- is one of the 6 basic attitudes in game and is purchasable for 40 coins in the store at level 1. Along with the Nice Fish, is the most inexpensive fish in the game. It is possible to breed this fish, but only if one of the parents have the mean trait.
Its caption reads:
"Some fish might wake up on the wrong side of the tank; this one LIVES there. This is a low-down troublemaker, so keep your distance... and don't try to hug it. It hates hugs."
Its favorite toy is the angry sign. It likes the crazy fish and dislikes the flirty fish (NOTE: Sometimes fish have likes and dislikes that are different than normal.)