Are sharks colour blind? Why NOT to wear black swim gear

5:28 AM Thu 20 Jan 2011 GMT

'Are sharks color blind?' DPI Victoria

Sharks are unable to distinguish colors, even though their close relatives rays and chimaeras have some colour vision, according to new research by Dr. Nathan Scott Hart and colleagues from the University of Western Australia and the University of Queensland in Australia. And this leads to the question -when you dive off your sailing boat to cool off or go snorkelling, should you be wearing pale blue swimmers and wetsuits? Their study shows that although the eyes of sharks function over a wide range of light levels, they only have a single long-wavelength-sensitive cone* type in the retina and therefore ...

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by Springer Science+Business Media/Sail-World