young, 3.3 mm
on food sponge?
with egg mass
Goniobranchus albopustulosus (Pease, 1860)
|Maximum size: 30 mm (Gosliner,
et. al, 2008).
species has a pale yellow mantle with white pustules and violet
scallops along its margin. The rhinophores are brown with white
lamellae and the gills are cream. The latter feature distinguishes it
from the similar appearing Goniobranchus
is commonly seen on rocky bottoms from the low
intertidal to 21 m (70 ft). It occurs in protected to exposed
locations. It may also be found occasionally in Halimeda kanaloana beds. It is usually nocturnal but may be found under rocks during
the day or resting in the open on shaded cliffs. It may feed on a cream sponge with yellow and rose undertones. (Note 1)
The egg mass is pale orange-yellow.
Big Island, Maui, Oahu, Kauai, Niihau, Pearl & Hermes Reef and Kure: also known from the Marshall
Scott Johnson suggested
on the Sea Slug
Forum that Chromodoris
alius, and Chromodoris
rufomaculata might be synonyms
of this species.
The name refers to the white pustules. It's referred to as the
"purple-edged nudibranch" in Hoover, 1998 and as the "white-bump nudibranch" in Hoover, 2006 while being listed as Chromodoris albopustulosa. It's also listed as C. albopustulosa in Bertsch & Johnson, 1981, Kay, 1979 and Kay & Young, 1969. It was first reported from
Hawaii in Pease, 1860 (as Doris albopustulosa).
Photo: PF: 16
mm: Makena, Maui; June 18, 1993.
Observations and comments:
1: The Oahu animals found with the sponge are in a posture typical of feeding. (see photos) But, the sponges show minimal damage leaving some uncertainty about the association.