There is a world of difference between a mermaid and a pirate.
They are two ends of a stick.
Mermaids are a living creature that is perfectly adapted to the marine environment.
A pirate is a terrestrial animal that is anxiously trying to survive in an otherwise inhospitable environment.
Mermaids to a large part live outside time.
Pirates exist in the moment: they need to be actively alert to stay alive in an otherwise hostile environment.
So are you a more like a mermaid, or are you more like a pirate?