Roger Hanlon

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sophisticated enough to defeat the visual prowess of diverse predators — teleost fishes, diving birds and marine mammals. Curiously, the quantification and experimental testing of camouflage principles have scarcely been addressed by biologists. By studying the cephalopods, we may have stumbled onto some general principles of animal coloration. Most animals(More)
— This paper describes a recent study in which an Autonomous Underwater Vehicle (AUV) with a high resolution stereo-imaging system was used to document nocturnal camouflage behaviour in cuttlefish at a well known spawning site in Whyalla, South Australia. The AUV's ability to fly at low altitude during day and night while closely following a desired survey(More)
Giant and colossal deep-sea squid (Architeuthis and Mesonychoteuthis) have the largest eyes in the animal kingdom [1, 2], but there is no explanation for why they would need eyes that are nearly three times the diameter of those of any other extant animal. Here we develop a theory for visual detection in pelagic habitats, which predicts that such giant eyes(More)
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