Pogonophora

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Riftia pachyptila

The Pogonophora, or beard worms, are a small group of deep sea tube worms often found growing around warm springs. The rear of the body is segmented, and together with the Vestimentifera they have recently been regarded as a family of annelids, called the Siboglinidae, though they were earlier treated as a phylum. They appear to feed primarily on symbiotic bacteria living in their mouthless bodies. Fossils of Pogonophora are rare. The first specimen was dredged from the waters of what is now Indonesia in 1900.

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