Bulbaeolidia alba (Risbec, 1928)
|Maximum size: 9 mm.
This is a chalk-white aeolid with prominent swellings on its
rhinophores and, usually, an orange-red patch on top of its head.
Often, there is also a narrow red line surrounding the bases of the
rhinophores. It is
similar to Bulbaeolidia sp. #1 but
is more coarsely mottled with
fewer cerata in each arc and less well defined white tips on its cerata.
is a common diurnal species found in protected to moderately
exposed rocky habitats and in Halimeda
kanaloana beds at depths of < 1 to 20 m (< 3 to 65 ft).
When crawling, it jerks its posterior cerata rhythmically. As least to
a human eye, this makes it resemble a sprig of the calcified
green algae Neomeris sp.
waving in the current. Its egg mass is a weakly kinked white spiral.
The eggs hatch in about four days in the laboratory.
Maui, Oahu, Kauai, Niihau, French Frigate Shoals and Midway: widely distributed in the Indo-Pacific.
This species is listed on many sites as Aeolidiella alba. It was first recorded in Hawaii at Magic Island, Oahu by Scott Johnson on Jan.
Photo: PF: 8
mm: found by CP: Hekili Pt., Maui; Sept. 25, 1990.
Observations and comments:
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