Seanet Mid Intertidal

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Phascolosoma agassizii  Keferstein, 1867
Phylum Sipuncula, Family Phascolosomatidae

Peanut worm. Small bulbous body with extensible tubular introvert (burrowed into shell rubble in photo); length 5-12 cm (half of which is introvert); mouth at end of introvert partially surrounded by short finger-like tentacles; body covered with short conical papillae; color tan to dk. brown w. dk. brown or purplish spots.

Abundant under rocks, among mussels, holdfasts, roots of surf grass, or nestled in crevices; mid- to low intertidal zones & subtidal; protected outer coast; deposit feeder.

Geo Range: Alaska to Baja
Synonyms:
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