Did you know that a group of jellyfish can be called a bloom, a swarm, or a smack? Despite the word “fish” in their names, jellyfish are not actually fish. No bones about it, they are invertebrates! Besides their lack of bones, jellyfish also lack a brain. Instead, they have a network of nerves, but no central nervous system. When feeding, jellyfish use their tentacles to sting their prey – they eat plankton. But what eats a jellyfish? Many animals do, including tunas, sharks, turtles, and even humans. November 3 is celebrated annually to honor the jellyfish in the seas across the world. We have compiled 10 interesting facts about the sea creatures to get in the spirit of today!
2. The Phialella zappai goldfish is named after US composer/guitarist Frank Zappa.
3. The earliest recorded use of the word “jellyfish” in English was in 1707.
5. A group of jellyfish is called a bloom, swarm or smack.
6. If a jellyfish is cut in two, the pieces can regenerate and create two new jellyfish.
8. Jellyfish do not have brains but instead have nerve nets which detect environmental changes and coordinate the animal’s responses.
9. In many languages the translation for the word jellyfish is medusa after the mythological Gorgon Medusa, whose snakes for hair suggested jellyfish tentacles.
10. Colonies of jellyfish are either all male or all female. Both sexes release both sperms and eggs.