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Additional Photos
on black
underside
egg mass
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GALLERY
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Roboastra gracilis (Bergh, 1877)
Maximum size: 13 mm (Bertsch
& Johnson, 1981).
Identification:
This species has a dusky orange body marked by interrupted bright
orange lines. The gills, cephalic tentacles, rhinophores and foot
are tipped with purple.
Natural history:
Roboastra gracilis
is a rare species known from only a few animals found in moderately
exposed to highly exposed rocky habitats between 3 and 9 m (10 and 29
ft). An 8 mm animal
laid an
arc-shaped, orange egg
mass that hatched in five days in the laboratory.
Distribution:
Maui, Oahu, French Frigate Shoals and Midway: widely distributed in the Indo-Pacific.
Taxonomic notes: It was first recorded in Hawaii at Makua, Oahu by Scott Johnson on June 1,
1980.
Photo: CP: 8
mm; Maliko Bay, Maui; April 19, 2008.
Observations and comments:
Note
1: ( )
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