what kind of water do jellyfish live in
Jellyfish Jellyfish are found in every ocean, from the surface to the deep sea. Scyphozoans are exclusively marine, but some hydrozoans live in freshwater. Large, often colorful, jellyfish are common in coastal zones worldwide. Jellyfish have roamed the seas for at least 500 million years,[2] and possibly 700 million years or more, making them the oldest multi-organ animal.[3]