OKINAWAN
OPISTHOBRANCH OF THE WEEK

Ventomnestia bizona (A. Adams, 1850) 4mm
Photo by Atsushi Ono

Opisthobranch of the Week Data

Taxonomy:

Frequency on Okinawa: Collection Data:
[brackets indicate range for all Okinawa-collected specimens of the species]


Species Account:

        The above featured little haminoeid, Ventomnestia bizona, was photographed and collected by Atsushi Ono from the waters of Amuro Island in the Kerama Islands, one of a series of islands in the Kerama Islands Group, which are located 30 ~ 40 kilometers west of the Okinawa Capitol, Naha. This featured animal was photographed and collected by Atsushi during April of 2002. The animal was found on a concrete block in thirteen meters of water. Atsushi (pers. comm.) reports seeing approximately 5 individuals but has collected only the above single specimen and considers it to be rare. I've added a second page with a photograph of a second 4mm individual from Zamami Island which was photographed but not collected during May of 1999. As of the current date (August, 2004), I've found no specimens (neither shell nor living animals) of V. bizona in the waters of Okinawa's main island.

        It should perhaps be noted that many of the bubble-shells are only known from their shells, so photos of the living animals are sometimes, at best, difficult to identify.


Page Date: 23 Aug '04
Page Modification Date: 23 Aug '04
Digitally manipulated photo
Copyright © 2004 Robert F. Bolland