disruptive colouration

disruptive colouration
an irregular colour pattern, often patches of light and dark, functioning as camouflage. The colour pattern disguises the fish\'s shape by breaking it up into visually distinct parts unlike a fish. Examples include eye stripes and ocelli. Even the stripes on a fish, individually distinctive, blend together and create the illusion of one large fish when schooling

Dictionary of ichthyology. 2009.

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