The Humboldt squid uses pigment sacs on its skin to "flash" and to "flicker," both previously-unknown behaviors, according to a study published today in the Journal of Experimental Biology. These displays were caught on cameras mounted on top of three 6 feet-long squid by a group researchers at Stanford University and at the National Geographic Society. According to the scientists, the squid might be using the flashing to communicate with others, whereas the flickering might be used as camouflage.
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