If merfolk were real (they're not) and if they had scientific basis in biology (they don't) - it's possible that they change genders. Humans have been fascinated with the sea, and with mermaid legends for a long time. https://t.co/dQVrZ6gqsy 7/8

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2019-07-08

As we understand more about fish, science have discovered that a lot of our favorite reef fishes population dynamics depend on gender transformation.
https://t.co/GFkwQiksB0
https://t.co/kyLJLyIDKS 6/8

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2019-07-08