The Compass Jellyfish lives in the Atlantic Ocean. The Jellyfish eats fish, Crustaceans, and other Jellyfish. A Jellysih's tentacles can still sting even if they are dead. They growto about 20 cm. in diameter. The Compass Jellyfish can change its gender from a male to a female. This Jellyfish have no head, eyes, or even ears. The Compass Jellyfish equipped with powerful stinging cells on its bell and tentacles that shoot out microscopic 'harpoons' to stun or even kill prey. Their boddy is mainly composed of water.