Octopus mimicking its follower reef fish

We describe a possible example of social mimicry between Octopus insularis and the small grouper Cephalopholis fulva, which frequently associate during foraging at Fernando de Noronha Archipelago, Brazil. The octopus, when swimming backwards, jet-propelled, becomes similar in colour and shape to acc...

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Published in:Journal of natural history 2009-01, Vol.43 (3-4), p.185-190
Main Authors: Krajewski, J. P., Bonaldo, R. M., Sazima, C., Sazima†, I.
Format: Article
Language:English
Subjects:
Cephalopholis fulva
Fernando de Noronha Archipelago
foraging association
Octopus insularis
social mimicry
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creator Krajewski, J. P.
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description We describe a possible example of social mimicry between Octopus insularis and the small grouper Cephalopholis fulva, which frequently associate during foraging at Fernando de Noronha Archipelago, Brazil. The octopus, when swimming backwards, jet-propelled, becomes similar in colour and shape to accompanying C. fulva individuals and is therefore less conspicuous within the fish group. We regard this as an instance of social mimicry, a form of protection against visually-oriented predators in which different species similar in shape and colour mingle for the advantage of grouping. Even when swimming backwards alone, O. insularis may become similar to foraging C. fulva individuals, another putatively protective behaviour. We suggest that the feeding association commonly found between O. insularis and C. fulva minimized the evolutionary costs for the origin of mimicking by the octopus. †Retired and associated as voluntary researcher.
doi_str_mv 10.1080/00222930802450965
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subjects Cephalopholis fulva
Fernando de Noronha Archipelago
foraging association
Octopus insularis
social mimicry
title Octopus mimicking its follower reef fish
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