Outside JEB column about the nematocysts, or "explosive cellular structures that fire a tiny barbed harpoon into predators and prey and inject a painful and paralyzing cocktail of chemicals" of jellyfish, anemones, corals, and freshwater hydra.
Fudge DS (2006) Nano-fast nematocysts. J. Exp. Biol. 209(17) iv. doi: 10.1242/jeb.02466.
The authors. Published by the Company of Biologists.