cells of and animals.

These cells explode forcefully towards triggering events, resulting in delivery. The result is of potential prey organisms as well as such that prey can then be .

The phylum containing the jellyfish, etc., is named after these cells and their action: phylum Cnidaria. Indeed, cnidocytes mean 'everything' to cnidarians, representing the key adaptation that allows them to serve as effective .

Cnidocysts can be used only once so must be replaced following firing. See also .