Tenellia sp.

Image courtesy of John and Lynette Flynn
Majuro atoll in the Marshall Islands

Image courtesy of John and Lynette Flynn

Tenellia sp. (undescribed)

Well they just keep rolling in from Majuro Atoll in the Marshall Islands. John and Lynette are loving their stay there and making the best of it - another undescribed species.

At first our citizen scientists thought this might be Tenellia sp. 75 in NSSI 2nd Ed, but it didn't take long for Terry Gosliner to look this puppy over and say "I am convinced this is something totally new, Tenellia sp. 75 is a specialist on the hydroid Tubularia, now called Ectopleura. It also has a very different head and body shape that is much broader."

John and Lynette's critter is white, as are the rhinophores and head tentacles, with pale orange at the base of the rhinophores and on the sides of the head, though the eye spot. The cerata have a yellow subapical ring.

Only 5 mm in length, this might be the holotype, when the species is officially described. Do I hear "Tenellia flynnorum"? Or maybe just "Tenellia majuroensis"?



Dave Behrens
Sammamish, WA 98074
Nov., 2021
Send Dave email at davidwbehrens@gmail.com

John and Lynette Flynn at the "clubhouse" of the Rongerik Yacht Club.
Rongerik is an uninhabited atoll in the Marshall Islands and to join the club you have to find some debris on the shore,
put your boat name on it, and hang it in the open air clubhouse.

We are John & Lynette Flynn, full time live-aboard cruisers and free-dive photographers who sailed our 46' boat "White Hawk" out of San Diego in 2014 and have been cruising the Pacific ever since.

We are currently "stuck" in the Marshall Islands due to COVID border closures, but we have been enjoying our time here hunting Opisthobranchs in shallow water from 0.5 to 5 meters. We are currently shooting with Sony RX100V's in Nauticam housings with CMC-1 wet lenses, SOLA Video Pro lights, and a Sea & Sea YS-D3 strobe.

Last year we photographed 51 species of Opisthobranch at Rongelap Atoll, and we are currently at over 100 species of Opisthobranch photographed at Majuro Atoll, including our first-ever discovery of a previously unknown species, a new Unidentia. We still shoot other animals but we are now full-fledged "nudiholics." Our motto is: "If you don't go - you don't know. If you don't look - you don't see."

Send John and Lynette mail at svwhitehawk@yahoo.com


Attention all you Sluggers, and you know who you are!

The NSSI 2nd edition is now available in ebook PDF and book form . The hard back version will become available Nov. 1st. Both will cost $65 (individually).

You will need to jump through a few hoops to get the electronic version as pdf distribution is protected by Adobe ID!! Please read the following to enable reading your electronic purchase!

This new 2nd Edition is updated and reorganized, including 185 new species. Among other features, the new edition includes additional photographs of species, an identification key, and an up-to-date classification reflecting the latest evolutionary relationships. The Indo-Pacific represents the largest expanse of tropical ocean in the world, stretching from the Indian Ocean coast of southern Africa and the Red Sea to the central Pacific of the Hawaiian Islands, Easter Island and the Marquesas.

This region supports the most diverse marine fauna of any place in the world for most groups of marine organisms. The nudibranchs and sea slugs are no exception to this rule; there are about 3,000 described species of these organisms in the world and at least 40% of these have been found exclusively in the Indo-Pacific tropics. This book illustrates 2,138 Indo-Pacific nudibranchs and sea slugs, including many undescribed species.


From left to right, Terry Gosliner, Angel Valdes, Dave Behrens La Jolla, Calif.

Send Dave email at davidwbehrens@gmail.com

© The Slug Site, Michael D. Miller 2021. All Rights Reserved.