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Photophores on fish are used for attracting food or for camouflage from predators by counter-illumination. [ citation needed ] Photophores are found on some cephalopods including the firefly squid , which can create impressive light displays, as well as numerous other deep sea organisms, such as the pocket shark Mollisquama mississippiensis and ...
When seen from below by a predator, the animal's light helps to match its brightness and colour to the sea surface above. Counter-illumination is a method of active camouflage seen in marine animals such as firefly squid and midshipman fish , and in military prototypes, producing light to match their backgrounds in both brightness and wavelength.
A transparency of 50 per cent is enough to make an animal invisible to a predator such as cod at a depth of 650 metres (2,130 ft); better transparency is required for invisibility in shallower water, where the light is brighter and predators can see better. For example, a cod can see prey that are 98 per cent transparent in optimal lighting in ...
The “rarely seen” predators were spotted off the California coast near San Diego. Boaters witness ‘unbelievable spectacle’ when predators attack sea creature. See it
Marine biologists have captured a rare sight of a giant pod of over 1,500 dolphins leaping and swimming off the California coast.. The “super pod” of Risso’s dolphins was spotted in Carmel ...
The "predator confusion effect" is based on the idea that it becomes difficult for predators to pick out individual prey from groups because the many moving targets create a sensory overload of the predator's visual channel. [62] "Shoaling fish are the same size and silvery, so it is difficult for a visually oriented predator to pick an ...
Bodycam footage shared by the Volusia Sheriff's Office shows Deputy Ric Urquhart and another deputy walking towards the huge fish that was stuck on the beach near Ponce Inlet, about 12 miles south ...
Experiments on blue jays suggest they form a search image for certain prey.. Visual predators may form what is termed a search image of certain prey.. Predators need not locate their host directly: Kestrels, for instance, are able to detect the faeces and urine of their prey (which reflect ultraviolet), allowing them to identify areas where there are large numbers of voles, for example.