As we light the last night of the Hanukkah menorah tomorrow, we look to the animal world to see some of their cool lights. The firefly squid (Watasenia scintillans) produces tiny flashes of light from hundreds of tiny organs on its body. 

Sketch and fact contributed by Amelia Munson

Source: Tsuji, F. I. (1985). ATP-dependent bioluminescence in the firefly squid, Watasenia scintillans. Proceedings of the National Academy of Sciences, 82 (14), 4629-4632.