Ardeadoris egretta Rudman, 1984 (76mm)
OPISTHOBRANCH OF THE WEEK
Opisthobranch of the Week Data
Frequency on Okinawa:
- Order: NUDIBRANCHIA
- Suborder: Doridina
- Family: Chromodorididae
[brackets indicate range for all Okinawa-collected specimens of the species]
- Individual Collection No: RFB #2367-B
- Location: Horseshoe Cliffs (26o30.0'N, 127o50.9'E) [All
collected specimens from Horseshoe Cliffs]
- Date: 9 May, 1990 [20 Jun 87, 21 May 89, 9 May 90]
- Depth: 30ft (9.1m) [10ft, 30ft, 30ft]
- Water temperature at collection depth: Not recorded
- Size: TL 76mm [36mm, 72mm, 76mm]
- Specimen deposited: Photo only (different individuals of the species deposited
at Cal Acad Sci).
Ardeadoris egretta is considered to be uncommon on Okinawa; although I have collected only three individuals and photographed one other, I've seen perhaps another dozen or so, but they were neither collected nor photographed. The only other Ardeadoris species found here is A.
scottjohnsoni, however, the white body, gills and rhinophores as well as the orange emarginated mantle of A. egretta easily separate the two animals.
Copyright © 1999 Robert F. Bolland
Digitally manipulated photo