New research which could help conserve sharks has confirmed that many of the ocean predators are probably completely colour blind.
The joint study by The Universities of Western Australia (UWA) and Queensland looked at the visual adaptations of two species of wobbegong sharks, which are also known as carpet sharks.
Wobbegongs spend most of their time on the sea floor and hunt mostly at night using an unusual sit-and-wait ambush strategy, the journal The Royal Society's Biology Letters reports.