"Exchange" - Nembrotha chamberlaini nudibranchs mating

I got some nice macro footage of Nembrotha chamberlaini nudibranchs mating at Red Rock and Twin Rocks in Anilao last year.

Nudibranchs have barbed penises to hold them together and the last clips shows the effort and twisting movement required to pull that pair apart.

Shot with my Panasonic GH4 in Nauticam NA-GH4 housing. I think I was using my Olympus M.Zuiko ED 12-50mm f3.5-6.3 EZ lens, with a Subsee diopter for some shots. The 2 most magnified shots are cropped in from 2160 to 1080p.

Nick, that is fantastic footage! Thanks a lot for posting it.

Coincidentally, I shot this pair two weeks ago, also at Twin Rocks in Anilao. I have yet to observe mating, but like to think that these two were engaging in a little courtship prior to the deed:

nick, i have shot the same thing they are mating in the end of Feb of this year too, also in Anilao but in dive site" cathedral"..

http://photo.xuite.net/leo.tsao/1532325/14.jpg