Home > Science > Biology > Flora and Fauna > Animalia > Chaetognatha
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.
http://www.microscopy-uk.org.uk/mag/artjan00/chaet.html
Photographic study by Jean-Marie Cavanihac of the Arrow Worm.
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