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Stiliger smaragdinus
Baba, 1949
 
Stiliger smaragdinus
Maximum size:  15 mm.

Identification:  This is a relatively large, olive-green species with spindle-shaped, slightly iridescent cerata. The distal portions of the cerata are darker green and their inner surfaces are weakly tuberculate with white flecks. The rhinophores are tipped with white and there is a dark olive-green line running across the head between the eye spots.

Natural history:  Stiliger smaragdinus is a rare species known from only three animals found in tide pools at rocky, highly exposed sites.

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

Taxonomic notes:  First recorded in Hawaii from Mokolea, Maui by PF on April 24, 1994.

Photo:  PF: 11 mm: Mokolea Point, Maui; April 24, 1994.

Observations and comments:

Note 1:  Two animals from Oahu showed no interest in Caulerpa taxifolia, C. ceratularioides and C. racemosa when offered pieces of those algae in a dish.
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