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. Occasionally, the yellow pigment may form discrete spots. 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) and may also be found occasionally in Halimeda kanaloana beds. It occurs in protected to exposed
locations. 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, Midway 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 (corrected in 2019 printing). 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 but the sponges show minimal
damage leaving some uncertainty about the association. (see photos)