Opisthobranch of the Week Data
Ercolania boodleae is considered to be very rare in Okinawan waters. I'm not aware it has been seen or collected in the waters off Okinawa's main island and Atsushi Ono reports (pers. comm.) seeing only the above uncollected animal as of the current date. Atsushi's photograph is used here with his kind permission. The featured animal was found on a sandy bottom in the waters off Zamami Island in the Keramas*. On these pages I've previously featured two undescribed Ercolania species, Ercolania sp. 1 and Ercolania sp. 2, both also from the waters of Zamami Island in the Keramas.
The following description of Ercolania boodleae is taken from Bill Rudman's Sea Slug Forum (2000):
Whole upper body surface except for anterior edge of head, eye-regions and border of foot is black or heavily dusted with black specks. The tip of the rod-like rhinophores are whitish. The branchia papillae (cerata) are blackish with a yellowish-brown (or orange-brown) cap with white specks at the tip - In rare cases there is no brown pigmentation. The anterior end of the foot is rounded which differentiates this species from Stiliger formicarius, a similar shaped and coloured sacoglossan. It is usually found in the upper levels of the intertidal zone on green algae, such as Cladophora, Enteromorpha, Boodlea and Ulva.
* Keramas = the Kerama Islands Group, located 30 ~ 40 kilometers west of the Okinawa capitol, Naha.