Fiery nudibranch looking less fiery due to red colour absorption.
Same photo but with colours enhanced!
Photos Derick Viljoen
Some more fiery nudibranchs, with egg cases.
Photo Guido Zsilavecz
A common problem with housed compact cameras is that the already small flash is often partially obscured, and the light of the flash simply does not reach its target. The absorbtion of colours at depth means that reds become duller, and appear as brown as in the photo by Derick. Playing around with photo editing software allowed me to recover some of the colours, and from the second photo it is clear that the nudibranch is indeed a fiery nudibranch, as shown in the third image.
Fiery nudibranchs are quite common in False Bay, and can be found about anywhere, but preferably reef walls, where often numerous gather in a small space, where they can be found together with their egg ribbons, shown in the third photograph.
For more details on the fiery nudibranch, see "Nudibranchs of the Cape Peninsula and False Bay", available directly from SURG or better Cape Town dive stores.
Nudibranchs of the Cape Peninsula and False Bay, G. Zsilavecz, 2007.