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Ceratosoma
(?) sp. #1

 
Ceratosoma(?) sp. #1
Maximum size:  63.5 mm.

Identification:  The body of this nudibranch is high with a narrowly undulating margin. It is bright yellow with irregular, white to pale-blue spots. The mantle edge is white with a peach submarginal band flanked dorsally and ventrally with a reddish-purple line. The foot has a reddish-purple submarginal line and a posterior dorsal “keel." The rhinophores are yellow at the base with purple tips. The gills are unipinnate with long narrow stalks. The pinnae are translucent and the rachis is purple. (Largely summarized from notes that Scott Johnson took upon examination of the first animal.)

Natural history:  Ceratosoma(?) sp. #1 is known from only two animals. The second was found in coral rubble at about 1.5 m (5 ft). The first laid a pink egg mass while held. (Scott Johnson, pers. com.)

Distribution:  French Frigate Shoals and Midway.

Taxonomic notes:  It was first recorded in Hawaii from French Frigate Shoals by Stan Jazwinski in June, 1983.

Photo:  Scott Johnson: about 40 mm: found by Stan Jazwinski; animal transported from French Frigate Shoals and photographed on Oahu; June, 1983.

Observations and comments:

Note 1:  ( )
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