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Additional Photos

side

dark

pale

young

feeding

egg mass
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GALLERY

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Gymnodoris alba (Bergh, 1877)

Maximum size: 15 mm.
Identification:
This
species varies from cream to pale pink with orange spots. The
cephalic hood is narrow and triangular. The gills are simple and form
an incomplete circle. Often, the rhinophores are tipped with
orange.
Natural history:
Gymnodoris alba is
a moderately common species found in protected to exposed
rocky habitats from < 1 to 6 m (< 3 to 20 ft). Rarely, it can be
found in Halimeda kanaloana
beds to 12 m (39 ft). Kay (1979) states that it feeds on aeolids of the
genera Favorinus and Aeolidiella. However, we've
seen it eat an Elysia in a
holding dish suggesting that it has a
somewhat broader diet. (Note 1) It lays a pale
orange, spiral egg mass that hatches in about 7 days in the
laboratory.
Distribution:
Maui, Oahu and Midway: widely distributed in the Indo-Pacific.
Taxonomic notes:
It
was first reported from Hawaii in Kay & Young, 1969.
Photo: CP: 6
mm: Kapalua Bay, Maui; April 3, 2007.
Observations and comments:
Note
1: A 4 mm G. alba attacked
an Elysia degeneri about 8 mm
in
length. It chewed completely through the Elysia's body at the level of the
pericardium, killing it, but consumed only a portion of its body. This
suggests that the species isn't limited to prey that it can fully
engulf. (see photos)
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