This has been reposted from our lab tumblelog
Bloodbelly Comb Jelly (Lampocteis Cruentiventer) -
This ctenophore is the only species in the genus Lampoctena due to various differences between it and other comb jellies. Comb jellies are not actual jellyfish, as they propel themselves via the iridescent cilia instead of stinging tentacles. They can grow up to 6 inches long.
In the depths of the ocean, the bright red color of the jellies appears black, allowing for good camouflage. Their color also helps cover the bioluminescent prey that it feeds on.
They are found in the depths of the Pacific Ocean near San Diego, but due to their coloration, are quite hard to find in the wild.
via the Lab Tumblr: http://genefish.tumblr.com/post/51405686152