JELLYFISH | WHAT DO YOU KNOW ABOUT THEM?

Jellyfish belong to the phylum Cnidaria , which is derived from the Greek word Cnidae , literally meaning "stinging," and

includes sea anemones, cerianthus and reef-building corals, as well as gorgonians, alcyonians and pearl coral.

Organized like an umbrella, the jellyfish body consists of an umbrella that allows a manubrium to dangle, in its center

ending in a mouth. The umbrella is fringed with threads called tentacles.

There is a huge variety of jellyfish, about a thousand species, ranging in diameter from a few millimeters (75% of jellyfish

invisible to the naked eye) to two meters.

Shapes are also very diverse: round, square, flat, dome-shaped, massive or airy...