Sabellid Worms, Tulamben (Bali, Indonesia) | ©Francesco Ricciardi

Bispira is a genus of tube-dwelling polychaete worms belonging to the family Sabellidae. It lives mainly on rocky substrata and reaches a length of up to 10cm.

Like other sabellid worms, gas exchange is through a crown of tentacles that also serve as a filtration-feeding system. The worm has no mobility outside the confines of the tube, and the filtration mechanism is susceptible to clogging if excessive suspended solids are present [source]. 

Animalia - Annelida - Polychaeta - Canalipalpata - Sabellidae - Bispira

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