young, about 7 mm
on food sponge
Aldisa sp. #1
|Maximum size: 20 mm.
a finely papillate, orange-red animal with red gills tipped in
white. The rhinophores and gills are bracketed by patches of
iridescent violet and pale yellow pigment. It may be distinguished from
pikokai by its two crater-like depressions on the mid-notum (in
contrast to three in the latter species).
Aldisa sp. #1 is a
moderately rare dorid found under rocks at moderately exposed to
exposed rocky sites at depths of 4-8 m (13-26 ft). It probably feeds on a
red-orange encrusting sponge. Twice, we've found it next to blood-red,
spiral egg masses in the
Big Island, Maui, Oahu and Kauai: (Note 1)
It was first
in Hawaii at Makua, Oahu by Scott Johnson on Feb. 15,
Makena Landing, Maui; Aug. 2, 2002.
Observations and comments:
1: This species appears to be part
of a complex that's widely distributed in the Pacific. However,
determining whether the Hawaiian population is endemic or also occurs
elsewhere will require more work.