Here's your beast:

http://www.jaxshells.org/fish29.htm

James

On Sat, Jan 3, 2015 at 2:07 PM, Susan J. Hewitt and/or Ed Subitzky
<[log in to unmask]> wrote:
> I don’t know the Indo-Pacific fauna at all, but my guess would be that this
> is a keyhole limpet, a fissurellid, family Fissurellidae. This would I
> presume be something in a genus not too distantly related to the Western
> Atlantic Lucapina or Lucapinella, where the mantle often covers the shell
> almost completely in life. And the “spike” at the top would be a breathing
> tube emerging from the keyhole in the shell. That’s my idea anyway...
>
> Susan J. Hewitt
>
>
> On Jan 3, 2015, at 1:56 PM, Dan Teven <[log in to unmask]> wrote:
>
> My friend Andy Martinez, the underwater photographer and author, shot this
> yellow nudibranch at 40’ depth in the Philippines.  He said it was about 1
> 1/2” long.  I cannot even place it to genus level, despite the prominent
> spike on its head, which ought to be a good diagnostic.  Maybe it’s not a
> nudibranch at all?
>
> Help with the ID would be greatly appreciated!
>
> http://www.bostonmalclub.org/shells/Unidentified_nudibranch.jpg
>
> Thanks
>
> - Dan Teven
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