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Eubranchus
sp. #1
 
Eubranchus sp. #1
Maximum size:  4 mm.

Identification:  This aeolid has a transparent body sprinkled with minute opalescent white flecks. There are scattered burnt-orange and dark brown flecks on the body, some fusing into short irregular lines. The cerata have three tuberculate swellings: the apical very small, the medial large and the basal intermediate in size. The rhinophores are smooth and translucent-orange with white bands at the base, midpoint and apex. The cephalic tentacles are also translucent-orange with white bands at the base and apex.. 

Natural history:  Eubranchus sp. #1 is a moderately rare species found in moderately exposed to exposed rocky locations at 6-24 m (20-80 ft). It has also been found in Halimeda kanaloana beds at depths of 9-20 m (30-66 ft). It appears to be mature by a length of 2.5 mm and lays a white egg mass. A 1/2 whorl mass laid by a 2.5 mm animal hatched in about 3.5 days in the laboratory.

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

Taxonomic notes:  First recorded in Hawaii off Makena, Maui by PF on Dec. 14, 1988.

Photo:   PF: 4 mm: off Makena, Maui; Dec. 14, 1988.

Observations and comments:

Note 1:  ( )
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