Polymastia pacifica (Lambe, 1893)
Aggregated nipple sponge
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Family:  Polymastiidae ()
Max. size:  2 cm H (male/unsexed)
Environment:  sessile; marine; depth range 0 - 15 m
Distribution:  Eastern Pacific: USA, Canada and Alaska.
Diagnosis:   
Biology:  White to yellow pale, breast-shaped individuals (1.2 cm at base and 2.0 cm in height) with single osculum; aggregations may cover 60-90 cm across. On rocks with sandy pockets at the very low intertidal zone (Ref. 865).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:   
 

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