Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Photo: A checkerboard cichlid (Crenicara punctulatum) at Dallas World Aquarium.

FIS031-00066

A checkerboard cichlid (Crenicara punctulatum) at Dallas World Aquarium. This fish species is hermaphroditic, meaning they’re born female and then change to male based on their hierarchy within the school.

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This photo © Joel Sartore 2021. Image usage guidelines

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