Gymnodoris okinawae Baba, 1936
|Maximum size: 30 mm (Kay,
body decorated with orange spots and white
patches. In younger animals, the white patches appear more extensive
with better defined margins. In older animals the orange spots often
fuse into short lines and meandering, subcutaneous acid glands may
develop. The gills form a complete ring around the anus
and often have opaque white pigment at their bases. Young animals can
be distinguished from Gymnodoris sp. #6 by their more
uniformly distributed white pigment and lack of rod-like rhinophores.
is a common species found in protected to exposed rocky habitats at
depths of < 1 to 3 m (< 3 to 10 ft). Kay (1979) states that it feeds on
the genus Elysia. We've
recorded it feeding on Elysia
holding dishes but we've also recorded it feeding on Thuridilla and Colpodaspis suggesting a somewhat
broader diet. (Note
1) It lays a bright orange egg mass that hatches in about 7 days in
Big Island, Maui, Lanai, Oahu, French Frigate Shoals and Midway: widely
distributed in the
Hawaii in Kay & Young, 1969. There's some chance that the yellowish
animals treated as juveniles might turn out to be different.
Photo: CP: 16
mm: Hekili Point, Maui; Oct. 27, 2004.
Observations and comments:
1: In August, 2002 a G. okinawae was left overnight in a
holding dish with an Elysia pusilla,
and a Colpodaspis thompsoni.
morning, all three had disappeared and the Gymnodoris was very "fat."