Genital copulation originated in the bony fish Microbrachius dicki. The genitals of male Bahamian mosquito fish who are cut off from predators by human roads have evolved to be shorter and less bony. | Harper's Magazine

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Genital copulation originated in the bony fish Microbrachius dicki. The genitals of male Bahamian mosquito fish who are cut off from predators by human roads have evolved to be shorter and less bony.

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Genital copulation originated in the bony fish Microbrachius dicki. The genitals of male Bahamian mosquito fish who are cut off from predators by human roads have evolved to be shorter and less bony.

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