Royal Netherlands Institute for Sea Research

A A

Jellyfish series

Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles. Large, often colorful, jellyfish are common in coastal zones worldwide. Jellyfish have been in existence for at least 500 million years, making them possibly the earliest animal group that had organised tissues.

Jellyfish polyps

Jellyfish polyps

Part 1 | Tiny polyps attached to hard surfaces such as stones, shells, wood and man made structures.

Cyanea spp.

Part 2 | Most species of jellyfish are quite harmless, except the species of the genus Cyanea.

Here are the polyps

Here are the polyps

Part 3 | Polyps and podocysts of 2 North Sea jellyfish species, Chrysaora hysoscella and Cyanea lamarckii.