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Giant Feather Duster Worm Video Stock Footage

E. polymorpha has a body up to 25 cm (10 in) long and 1.2 cm (0.5 in) thick and lives within a tube. This is parchment-like and composed of sediment cemented with mucus. It is a brownish colour, translucent and often strengthened with sand and shell fragments. On rocky shores, it may be hidden in a crevice and difficult to dislodge. The branchiae (feeding appendages) in the feathery crown also function as gills. They are also known as radioles, and are a shade of red or brown, banded with paler sections. Shades vary, but the most frequent colouration is maroon with orange tips. They arise from two spiral, deeply cleft, bases. They bear eyespots which alert them to sudden shadows or movements nearby. This enables the crown to be retracted into the tube very rapidly when danger threatens. The posterior segments of the worm bear hooked bristles which help anchor it in its tube. E. polymorpha can be distinguished from the very similar Eudistylia vancoveri by the cleft in the crown. Also, E. vancoveri generally has red branchiae with white tips. Reproduction takes place in the spring, and fertilization is external. The gonads are on the dorsal side of the abdomen and the gametes mature in the coelomic spaces. They are then passed forward by cilia along the faecal groove and are released into the water column. The larvae are planktonic and grow rapidly. After about three or four weeks, they settle out as segmented larvae.

Learn more about Giant Feather Duster Worm

Animalia: Annelida: Canalipalpata: Polychaeta: Sabellidae: Eudistylia polymorpha

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