Poison bristle nudibranchs, Lighthouse, Vatuira Channel, Fiji.

I don't know  what the heck these animals are doing.  They danced around on the reef for quite a while, and spent much of that in a t�te-�-t�te similar to what you see here.

Nikon F4, 105mm f/2.8 AF Auto Micro Nikkor, TC-14 tele-extender, PK-14 (14mm) extension tube, Aquatica Housing, 2 Ikelite 200 strobes, f/22, Fuji Reala 100.