Chalk bass are more committed to their spouse than their gender. A new study shows the monogamous hermaphrodite fish switch genders up to 20 times a day. The sexual flexibility allows the pair to share the reproductive burden more fairly, researchers say.

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Chalk bass are more committed to their spouse than their gender. A new study shows the monogamous hermaphrodite fish switch genders up to 20 times a day. The sexual flexibility allows the pair to share the reproductive burden more fairly, researchers say.