OKINAWAN
OPISTHOBRANCH OF THE WEEK

Marionia rubra (Rüppell & Leuckart, 1831) 280mm
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:

        Marionia rubra is considered to be very rare in Okinawan waters. I've never seen the species in the waters of Okinawa's main island and Atsushi has seen only the above single featured animal in the Keramas. * Atsushi found this huge tritoniid associated with rock found in a reef environment. The images of M. rubra on these pages are used with Atsushi's kind permission. I've added a second page with three additional images of this large and beautiful animal.

        Bill Rudman (2001) mentions on the Sea Slug Forum the current distribution of the species is from the Red Sea. Possibly Ono's animal featured above is an undescribed animal; unless I hear differently, I'll stick with the current species designation.

        In addition to the above featured animal, I've previously shown four unknown Marionia species on these pages. These four unknown animals are as follows:

  • Marionia sp. 1
  • Marionia sp. 2
  • Marionia sp. 3
  • Marionia sp. 4
  • Literature Cited:


            * Keramas = the Kerama Islands Group, located 30 ~ 40 kilometers west of the Okinawa capitol, Naha.


    Page Date: 19 Mar '07
    Page Modification Date: 21 Jan '13
    Digitally manipulated photo
    Copyright © 2013 Robert F. Bolland