National Geographic : 1967 Mar
Like iridescent darts, flying squids (Onychoteuthis banksi) zip past other creatures of tropic oval spot near its head no longer glowed, but mantle. They were invisible from the outside when we darkened the room and turned on now, though in life the mantle of this squid the ultraviolet light, the spot again glimmered is almost completely transparent. with an eerie greenish-yellow hue. As the ani- "These organs are spread all through the mal died, the glow faded. belly, head, arms, and tentacles of the animal. "But what about the flashes the squids They give off a whitish light. Now look at the made just before they grabbed the flying difference between these photophores and the fish?" one of the crew members asked. "They orange spot on the back." seemed to come from all over the body." Clyde slit the two-inch-long oval, and a In answer, Clyde Roper turned the lights mass of ricelike kernels poured out. They on, slit open the squid, and pointed out the produce the strong yellow-orange glow that photophores, tiny spherules like pale grains gives this swift Atlantic squid, Ommastrephes 392 of sand embedded in the creature's fleshy pteropus,its common name of "orange back."