OKINAWAN
OPISTHOBRANCH OF THE WEEK

Gymnodoris sp. 6 (61mm)

Opisthobranch of the Week Data

Taxonomy:

Frequency on Okinawa: Collection Data:
[only a single specimen seen/collected]


Species Account:

        Gymnodoris sp. 6 is considered to be very rare in Okinawan waters in as much as it's the only one I've seen and as of the current date (mid-February, 2011) it's previously unrecorded in the literature. This remarkable gymnodorid was found crawling on the surface of silty sand near pier pilings supporting Tengan Pier. This was a relatively short dive (ca. 110min, primarily due to the colder waters during this time of the year). I frequently see 15 plus species of opisthobranchs in the general "under-pier" area, but only infrequently do I see other gymnodorids. Possibly the great numbers of opisthobranchs found at this locality are due to the dense colonies of bryozoans, cnidarians, poriferans, and others, covering the pier pilings and pier-related materials beneath the pier. It should also perhaps be pointed out that I've frequently exceeded 200 minutes of dive time, which may, at least in part, explain the high numbers of 'branchs frequently seen here.

        I've also added a second page w/ several additional images of Gymnodoris sp. 6.

        In addition to the above featured Gymnodoris sp. 6, I've previously featured on these pages the following described and undescribed species of Gymnodoris from Okinawan waters:

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


Page Date: 14 Feb '11
Page Modification Date: 01 Aug '15
Digitally manipulated photo
Copyright © 2015 Robert F. Bolland