Fish that change sex

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We wanted to tell a story of seasonal change in One Ocean and to show how small changes in temperature can have a big influence on marine life in the seasonal seas. Now, a study carried out at the University of Otago on bluehead wrasses, a small-bodied fish that lives in coral reefs in the Caribbean, has found out how they do it. Scientists have, for the first time, unlocked the mystery of how species of fish—including the famous clownfish—change their gender in adulthood, often in response to environmental cues. CN — Hundreds of species of fish are able to completely reverse their sex several times during their lives, and researchers in New Zealand said in a study published Wednesday they have finally identified the genes that allow for this transformation. Millions of people saw a dramatic example of this in the first episode of Blue Planet II, in which a ten-year-old female kobudai also known as an Asian sheepshead wrasse, Semicossyphus reticulatus changes into a male.

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Genetic secrets of sex-changing fish discovered

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For the bluehead wrasse, going from female to male involves a dramatic genetic reprogramming in the sexual organs.

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Miranda Dyson explains the biological process The phenomenon of sex change in individual life occurs in about species of fish, mainly marine species. We may take it for granted that the sex of an animal is established at birth and doesn't change. Sex change is a process by which a person or animal changes sex — that is, by which female sexual characteristics are substituted for male ones or vice versa. A Fisheye View of the Tree of Life.

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