This update finally brings the long awaited support for WorldGuard! The region flags can be found on the WorldGuard page on the Official Wiki but the new flags are:

• bf-area <Area Name>
  • Sets the Region to be treated as a specific Fishing Area
• bf-fish <Fish Name>
  • Sets the Region so that only that specific type of fish can be caught there.
• bf-endgame <True/False>
  • Areas with this flag enabled will be treated as if it were the All Blue, meaning ALL fish can be caught in it.
• bf-fishing <Allow/Deny>
  • Defines whether fish can

Massive ShoutOut to everyone who suggested this update over the past several months!