We don’t know for sure how old he was, but I’m guessing around 18-ish so they can have Colin play his younger self like they’ve done with other characters.
I like the idea of there being a specific reason that he doesn’t like mermaids. Something like a crewmate or Captain of his being killed by mermaids would work quite nicely. Make that someone be Eric, and it would entwine Hook and Ariel’s history and give them something to overcome in order to be together.
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