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Thanks! Frankie~

While some fish can only undergo a sex change once in their lives, others can go back and forth many times, or even have both sexual organs at once.

Clownfish live on the reefs in a group. There is strict hierarchy based on size: the largest is the female, next largest is the male, and then the non-breeding males. If the female dies, the male will change sex and become the female and she begins mating with the next male. This mating strategy is advantageous for reproduction, particularly since this fish never ventures very far from home. If the males look for new female partners rather than change sex, the process can take months. During this time the fish would be unable to reproduce, and might miss his only opportunity to mate.
In coral reef fishes, sex change is a normal process.

see the FULL story at:

Gender ambiguity in animalsNagaland Post : Blog Article

Electricity Sparks New Life Into Indonesia's Corals
A weak, harmless voltage run through metallic structures underwater is reviving near-dead reefs.



see the FULL story at:
Electricity Sparks New Life Into Indonesia's Corals : Discovery News