Nudibranch – phyllidiidae
Photographed at approximately 15 meters deep.

Nudibranch - phyllidiidae

D800 in Ikelite housing, ISO100, 1/250 sec @ f/8, Tamron 90mm macro, Ikelite DS161 strobe

For some weird reason some colors disappear when using strobes underwater.
The green color on this nudibranch had disappeared due to the strobe light. It was brought back in post-process using Photoshop.