Jellyfish have no brains, blood or bones — in fact, the average jellyfish is composed of 94-98% water. A jellyfish consists mostly of a bell-shaped body with tentacles and a mouth.
More facts about jellyfish:
- A group of jellyfish is called either a bloom of jellyfish or a swarm of jellyfish.
- Most jellyfish are carnivorous, feeding off of fish, fish eggs, plankton and smaller jellyfish. Although they do not have a stomach, jellyfish have a gastrovascular cavity that absorbs nutrients.
- In many Asian cultures, jellyfish is served pickled, salted or dried. A processed jellyfish loses more than 90% of its weight in the processing.