A new study led by researchers at the American Museum of Natural History looks at the genes behind an incredible, luminous seasonal mating display produced by swarms of bioluminescent marine Bermuda fireworms. The new research, published today in the journal PLOS ONE, confirms that the enzymes responsible for the fireworms’ glow are unique among bioluminescent animals and entirely unlike those seen in fireflies. The study also examines genes associated with some of the dramatic—and reversible—changes that happen to the fireworms during reproduction.