Stinging cells, produced by cnidarians such as jellyfish and anemones, are one of ocean creatures' most effective defences. This method of protection can keep almost all predators at bay - but not the ...

“Jellyfish have stinging cells called nematocytes,” explains Dr Ronald Jenner, our Principal Researcher in venom evolution. “They have thousands of these along their tentacles. The stinging cells ...

Mucus from jellyfish that sit upside-down on the seafloor has blobs lined with stinging cells The stinging cells are coated on tiny mobile blobs called cassiosomes within the mucus that “zoom ...

Each tentacle has about 5,000 stinging cells, which are triggered not by touch but by the presence of a chemical on the outer layer of its prey. Box jellies are highly advanced among jellyfish.

The stinging cells on the tentacles with which it fishes secrete a substance that is almost as toxic as cobra venom This colorful jellyfish is not one organism but a colony of four kinds of polyp.