Speak of the devil - this paper just came out:

Comb Jelly Genome Sheds Light on ... Light

Genomic organization, evolution, and expression of photoprotein and opsin genes in Mnemiopsis leidyi: a new view of ctenophore photocytes

They claim this is the first genomic sequence from any bioluminescent animal, and this organism has the same coelenterazine-dependent "photoprotein" luciferases as found in Renilla and A. victoria.

Unfortunately, even though they found *ten* luciferase genes, they did not find any GFP homologs. And they do not know whether this particular species requires coelenterazine in its diet for bioluminescence, or whether it can synthesize the coelenterazine itself - sounds like someone should go figure that out asap. Still, a good first step...

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