Seanet Mid Intertidal

High Intertidal Mid Intertidal Low Intertidal    Rocky Shore Taxonomic Subtidal Taxonomic    Rocky Shore by Pictures Subtidal by Pictures

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
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