OKINAWAN
OPISTHOBRANCH OF THE WEEK

Marionia sp. 3 (98mm)

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 sp. 3 is considered to be very rare in the waters of Okinawa's main island as I have seen and collected only the above single individual over a period of many years of diving here. The animal was collected near shore, during a relatively high spring tide (178cm) from an area of live stony corals while turning coral rubble. As a large slab of rubble was overturned the animal was discovered on the lower surface of the slab. I've added a second page showing a close-up view of the elaborate rhinophores of this relatively large tritoniid nudibranch.

        Marionia species are known to prey on xeniid soft corals (Gosliner, et al, 1996), however, Marionia sp. 3 was not found associated with any food source.

        Marionia sp. 3 is one of several undescribed species of Marionia from Okinawan waters. As of mid-June, 2013, I've featured four unknown (undescribed?) species on thses pages. These four are as follows:

  • Marionia sp. 1
  • Marionia sp. 2
  • The above featured animal Marionia sp. 3
  • Marionia sp. 4
  • Literature Cited:


    Page Date: 7 Jun '04
    Page Modification Date: 21 Jan '13
    Digitally manipulated photo
    Copyright © 2013 Robert F. Bolland