Camouflage is one of the most widespread anti-predator strategies in nature. I had a bonded pair where one was gray & the other yellow. (Image credit: Alice Lown) Over the next hour, the researchers took photos of the fish in the buckets. One such species is the rock goby (Gobius paganellus), a common rockpool fish capable of rapidly (within one minute) changing its colour and luminance (perceived lightness) when placed on different backgrounds. Author information: (1)Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, Cornwall, United Kingdom. Just this week I noticed that my yellow watchman goby has changed color. Common rock pool species from a variety of taxa change color for camouflage (Keeble & Gamble, 1899; Fries, 1942; Stevens, Lown & Denton, 2014a; Stevens, Lown & Wood, 2014b). Common rock pool species from a variety of taxa change color for camouflage (Keeble & Gamble, 1899;Fries, 1942; Stevens, Lown & Denton, 2014a; Stevens, Lown … Within a minute, the rock goby can change its color and brightness to disguise itself from hungry predators, such as birds He is the only fish … Then one day I … He is not as bright yellow as he was. I've also read that the yellow is male, the gray female. But I had one go through a color change. I don't know if this is correct. The rock goby Stevens M(1), Lown AE(1), Denton AM(1). They were very tiny juveniles. The yellow was always going for a swim in the filter sox. His blue speckles are still bright and shining and his eyes look good, but his color has taken on more of a gray hue. Rockpool gobies change colour for camouflage. adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A The unassuming rock goby, a small fish that can be found in rock pools around the United Kingdom, southern Europe and North Africa, is a master of camouflage, a new study finds. Camouflage can be particularly challenging in heterogeneous environments, and as such some animals have evolved under selection to change colour to enable them to camouflage on a range of different background types. The unassuming rock goby, a small fish that can be found in rock pools around the United Kingdom, southern Europe and North Africa, is a master of camouflage, a new study finds. The rock goby can change both its color and brightness in just one minute / Alice Lown. evolved under selection to change colour to enable them to camouflage on a range of different background types. 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