Alpha-male bluestreak cleaner wrasse fish punish females who eat the rich mucus of the wrasses' client fish (and thereby threaten to scare off those clients) as well as females who eat too many client parasites (and thereby threaten to transform themselves into male wrasses) commensurately with the degree of the females' offense. | Harper's Magazine

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Alpha-male bluestreak cleaner wrasse fish punish females who eat the rich mucus of the wrasses’ client fish (and thereby threaten to scare off those clients) as well as females who eat too many client parasites (and thereby threaten to transform themselves into male wrasses) commensurately with the degree of the females’ offense.

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Alpha-male bluestreak cleaner wrasse fish punish females who eat the rich mucus of the wrasses’ client fish (and thereby threaten to scare off those clients) as well as females who eat too many client parasites (and thereby threaten to transform themselves into male wrasses) commensurately with the degree of the females’ offense.

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