Seanet Mid Intertidal

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Dodecaceria fewkesi  Berkeley & Berkeley, 1954
Phylum Annelida, Class Polychaeta, Order Terebellida, Family Cirratulidae

Small to medium worm; 40 mm long, with dark green- black body; crown of 12 tentacles 1-2 mm in diameter surrounds mouth; colony forms by asexual fission of single original founder; at low tide hard solid masses of fused calcareous tubes resemble concrete riddled with tiny holes.

Locally abundant on rocks, mid- to low intertidal zones & subtidal; protected outer coast.

Geo Range: British Columbia to southern California
Similar species:
subtidal D. fewkesi grow as clusters of  larger erect tubes; smaller Dodecaceria concharum bore into calcareous material such as crustose corallines & do not occur in the intertidal zone.

Image: contracted Anthopleura elegantissima (across top).