Lucky Fishing Hat

The Lucky Fishing Hat is an uncommon cloth hat with a bonus to stamina and fishing.

Source
Lucky Fishing Hat is a quest reward from the Stranglethorn Fishing Extravaganza quest Rare Fish - Keefer's Angelfish, which starts at the Fishbot 5000 in Booty Bay in Stranglethorn Vale. To complete the quest, you must turn the following item to the Fishbot 5000:
 * 1 Keefer's Angelfish