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Polycera
japonica
Baba, 1949
 
Polycera japonica
Maximum size:  7 mm (seldom exceeds 4 mm).

Identification:  This is a small, light to dark brown species mottled with darker brown and cream. The rhinophores appear disproportionately large and there are short, largely transparent velar appendages. Rarely, purple patches may be present in the bases of the branchia.

Natural history:  Polycera japonica is a moderately common species found in highly protected to exposed rocky habitats and in Halimeda kanaloana beds at depths of < 1 to 9 m (< 3 to 30 ft). It's much more common in the Halimeda kanaloana beds than in rocky areas. It lays small, cream egg masses ranging from 1/2 to 2 whorls.

Distribution:  Maui and Kauai: widely distributed in the Indo-Pacific.

Taxonomic notes:  First recorded in Hawaii from Black Rock, Maui by CP on Oct. 16, 1994.

Photo:  CP: light; 3 to 4 mm: found by PF; Maalaea Bay, Maui; Oct. 5, 2007.

Observations and comments:

Note 1:  ( )
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