Reef Stalker Fish

A stealthy predator fish that camouflages in coral reefs. It can change its colour depending on what block it is, making it harder to spot. It hunts tropical fish, by waiting for one on the coral and after the fish gets close it quickly attacks.
Is neutral towards player if not provoked, then it bites him and flees. If the player gets too close without attacking, it just quickly flees.
The mob preys only on small fish and is scared by animals bigger than itself.