Why do some fish change sex during their lives?
Quick Answer
Some species change sex because it can improve reproductive success depending on size, age, or social structure. In many reef fish, being male or female is more advantageous at different life stages.
The Full Story
Sex change in fish is an adaptive strategy found in several species, especially among reef dwellers such as wrasses and clownfish. In sequential hermaphrodites, individuals may begin life as one sex and later switch to the other when conditions make it more advantageous. For example, in some species it pays to be female when small and male when large, or vice versa. This flexibility can increase the number of offspring produced in a population. The phenomenon has made fish a major topic in studies of reproductive biology and social behavior.
Key Facts
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