Chaetognatha Animalia Flora and Fauna Biology

Phylum of small, somewhat fish-like, marine invertebrates with one or two pairs of lateral fins and a large horizontal tailfin. They poison their prey with a toxin produced by bacteria carried in their head. There are about 200 known species but there may be many more in the deep ocean.

• The Chaetognath, a Strange Creature - Photographic study by Jean-Marie Cavanihac of the Arrow Worm.

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