Squid and sepia amaze me and just look at the skin sparkle.

Deep in the ocean, where sunlight can no longer penetrate, lies an incredible world of darkness. And against all odds, this just happens to be the location of one of nature’s most impressive artificial light shows. The creatures here have evolved their own ways of dealing with the darkness. Through a process known as bioluminescence, they have developed the ability to use chemicals within their bodies to produce light. If you have ever seen a firefly then you have witnessed the same process in action. Bioluminescence is mainly a marine phenomenon, and it is not found in freshwater. http://en.wikipedia.org/wiki/Sepia_officinalis