The Humboldt squid has evolved a novel solution to the problem of communicating in the depths of the ocean. Found up to 2,300ft beneath the surface of the eastern Pacific Ocean, the Humboldt squid can grow up to 1.5 meters in length and typically travels in large groups of up to 1,200 individuals. One of their most fascinating traits is their ability to produce dazzling bioluminescent displays using special pigment cells called chromatophores. Such displays serve as a means of communication between individuals, however it has long remained unclear exactly how the squid are able to see each other in the darkness at such depths. Now a new study by Ben Burford of Stanford University and Bruce Robison of the Monterey Bay Aquarium Research Institute has shed new light on the mystery by showing that the squid have special bioluminescent light organs called photophores that effectively serve as a backlight. "Humboldt squids have small aggregations of luminescent tissue - little dots sprinkled