Ulrike E. Siebeck of the University of Queensland in Australia's research provides support for the idea that some fish use ultraviolet light as a means of communication.The research group studied two types of fishes: Pomacentrus amboinensis and P. moluccensis. Under UV light they are revealed to have distinctly different patterns in the scales around the eyes. To people, the two species of reef fish look practically identical. But fishes can hardly distinguish each other.
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