How is it possible for certain fish to change their gender?

I read somewhere that some fish change their gender.How is it possible for certain fish to change their gender?
As an example



If you buy a group of clown fish, they will all be males, but when they sexually mature the biggest one will change to a male

That's absolutely normal and has nothing to do with chemicals or adding anything, that's just their nature

http://www.flmnh.ufl.edu/fish/InNews/swa





Hope that helps

Good luck





EBHow is it possible for certain fish to change their gender?
you welcome ;)

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they are usually asexual or have both reproductive systems.
The fish are exposed to chemicals that alter them.