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Okenia
sp. #1

 
Okenia sp. #1
Maximum size:  4 mm (Midway animals to 10 mm).

Identification:  This is a cream dorid with a notum variably streaked with opaque white. It has a pair of elongate extra-branchial processes and a series of short thorn-like processes lining the notum. The latter vary considerably in length. The rhinophores are simple and both the processes and rhinophores are tipped with orange.

Natural history:  Okenia sp. #1 is a moderately common species found in moderately exposed to exposed rocky habitats and Halimeda kanaloana beds at depths of 4-11 m (13-36 ft). One animal laid a crescent-shaped, white egg mass measuring 1.4 mm by 0.5 mm.

Distribution:  Maui, Oahu and Midway.

Taxonomic notes:  First recorded in Hawaii from Midway Atoll by Terry Gosliner and PF in June, 1993.

Photo:  CP: 3 mm: Ulua Beach, Maui; Nov. 26, 2004.

Observations and comments:

Note 1:  ( )
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