Yep, pirate metal is a thing.  Alestorm also have song that sums up CROW brilliantly (on all sides) that can't be published here (at least by my modest, sheltered, taste  :ang: ) - goto YouTube and look for F**ked with an Anchor.
https://www.youtube.com/watch?v=f55CqLc6IR0

Absolutely superb....

Think I might a bottle of rum at the weekend...
https://www.youtube.com/watch?v=IaaeUZkPWPY