20060416 UW 024.jpg

I know this nudibranch a Chromodoris but I can't work out whether it's a
chromodoris magnifica (Magnificent Chromodoris), a chromodoris strigata
(Strigate Chormodoris), or something else. If anyone can give me a
positive ID for it that would be welcome.

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Update 2006.04.20 - in response to a question:

I think the colours as displayed are the "true colours". There's genuine
room for interpretation of "true colour" in underwater photography, because
in their natural environment (this was more than 10m deep) these objects are
never subject to white light (effectively no red light penetrates so far
underwater) and so there is no unambiguous reference. Divers' eyes adapt to
compensate somewhat for the missing colour, but they can't compensate well
for the completely missing red. Often I don't know whether an object has
strong red colour until I see it under torchlight or flash. If an object
normally has effectively no red light falling on it, but is strongly red
coloured under white light, is the red colour its "true colour"?

I normally use "flash" or "daylight" white balance for close-up underwater
flash photography. I think this gives "true" foreground colours, even though
it's not what I see when I'm there; but the background is not colour-balanced
and comes out greener or bluer than I perceive when I'm actually there. (It
really is green or blue, but my eyes adapt to the dominant colour so when I'm
there I'm not so aware of it.)

BTW this picture is in the Image By Chance gallery and in the
2006.04.13 Puerto Galera gallery of the diving and snorkelling gallery.