Random Facts: Jellyfish

Jellyfish existed long before us or even the dinosaurs. They have been in the oceans for around 650 million years.

The earliest recorded use of the word “jellyfish” in English was in 1707.

The largest jellyfish ever found was a lion’s mane jellyfish with a diameter of 7ft 6in and 120ft long tentacles.

A group of jellyfish is called a bloom, swarm or smack.

If a jellyfish is cut in two, the pieces can regenerate and create two new jellyfish.

Jellyfish do not have brains but instead have nerve nets which detect environmental changes in and coordinate the animal’s responses.

In many languages, the word for jellyfish is medusa after the mythological Gorgon Medusa, whose snakes for hair suggested jellyfish tentacles.

Colonies of jellyfish are either all male or all female. Both sexes release both sperms and eggs.