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One of these is the striking and endangered humphead wrasse. It is a large fish and can reach 2 metres and weigh about 180 kg (397 pounds). What makes this fish so interesting is that they can change gender throughout their lives! They start off as females, but change to males in their late adulthood, but not all change gender/sex. This is a long-lived fish, reaching about 30 years, but take long to breed – only reaching sexual maturity between 5 - 7 years, and some change into males at only 9.
The factors responsible for this incredible change is not known. Sadly, the numbers of this great fish are declining, primarily due to overfishing. Their reduced numbers have made them an endangered species.