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Siphopteron quadrispinosum
Gosliner, 1989
 
Siphopteron quadrispinosum
Maximum size:  5 mm.

Identification:  This species has a bright yellow body. The parapodia are margined in white and both the siphon and flagellum are red.

Natural history:  Siphopteron quadrispinosum is a common diurnal species found on open sand and in Halimeda kanaloana beds at depths of 6-27 m (20-90 ft). Numbers appear every year on open sand in early summer and then decrease until virtually none are seen during the fall, winter and spring. They swim readily when disturbed and lay a flattened, pale yellow egg mass. On July 12, 2013 Paul Okumura observed one being eaten by the the sand-dwelling anemone, Mesacmaea sp. (see photos).

Distribution:  Big Island and Maui: widely distributed in the western & central Pacific.

Taxonomic notes:  First recorded in Hawaii from Kihei, Maui by Stan Jazwinski in Oct. 1978.

Photo:  CP: 5 mm: Airport Beach, Maui; June 1, 2008.

Observations and comments:

Note 1:  ( )
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