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Shades of Grey
Two species of wobbegong sharks lack the capacity to distinguish colours, and Prof Shaun Collin of the University of Western Australia says the discovery could help prevent shark–human interactions for the benefit of both.
The carpet sharks studied are not a threat to humans, but Collin says the finding adds to other evidence that all sharks are colour blind.
Multiple photoreceptors are required for colour vision, but Dr Susan Theiss’ PhD thesis has revealed that wobbegong eyes have only one class of photoreceptor. The finding was published in...
