Fossil range: 505 mya to present
Pacific sea nettle (Chrysaora fuscescens) at Monterey Bay Aquarium
Jellyfish are animals of the phylum
They have soft bodies and long,
Most jellyfish have a
There are many types of jellyfish. The smallest jellyfish are just a few inches across. The largest jellyfish is the Lion's mane (Cyanea capillata), whose body can be over 3 feet (1 m) across, with much longer tentacles. Some jellyfish
Many animals eat jellyfish, including sea turtles and some fish (including the sun fish). Humans eat jellyfish too; especially in Asia jellyfish are considered a delicacy. Jellyfish spoil very quickly after they are caught. Sometimes they are dried to preserve them. There is a different process in which they are cleaned, which can take up to 40 days. They are often eaten in a kind of salad, with soy sauce or vinegar.
Most jellyfish undergo two distinct life history stages (body forms) during their
In the second stage, the tiny polyps asexually produce jellyfish, each of which is known as a
Medusae have a
Medusozoans differ from anthozoans in having a
A group of jellyfish is called a smack; an occurrence of many jellyfish simultaneously is sometimes called a bloom.