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Abstract

Naive damselfish, Dascyllus albisella, were tested for their initial response to the Hawaiian cleaning wrasse, Labroides phthirophagus. Contrary to some current theory, some individuals, including both lab-reared and wild-caught fish, showed a full ‘pose’ response to visual stimuli from the cleaner without prior tactile stimulation, while others failed to show this response even after 4 d of exposure to visual and tactile stimuli. These individual differences could have resulted from innate differences or uncontrolled variables in their experience.