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        Part of EARTH A New Wild
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        Sexual Selection in Cichlids | EARTH A New Wild

        Cichlid fish are seen here eating (and spitting out) soil from the bottom of Lake Malawi. This bizarre behavior is not for nutrition, though, but is actually used to create pits and mounds in the soil for a mating ritual. Although the fish are only a few centimeters long, some of these formations can be as big as a fully-grown diver. Use this resource as an example of mating behavior and sexual selection.

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