Desert Island · optional boss catch
This profitable Desert side boss is also the gateway to cooked healing and the 1.5× sale route.
Immediate answer
On Desert Island, use 280-coin Standard Boss Lure (dedicated encounter route). Track its movement with rapid follow-up shots rather than slow melee pursuit. After the fight, secure Deliver the body to the Grillmaster to start the grill and unlock cooking..
This guide separates the route item from the combat plan so you can prepare before spending a lure, placing a body or consuming a unique quest trigger.
280-coin Standard Boss Lure (dedicated encounter route).
Reach Desert Island by following the five-island story route. Return the Giant Piranha trophy and follow the yellow Radar marker.
Blue Shark is the grill unlock, not the Desert story boss. Carry the body to the Grillmaster instead of selling its valuable catch.
Deliver the body to the Grillmaster to start the grill and unlock cooking.
Put trophies and physical trigger bodies into a deliberate safe place before shopping or sailing. Patch 1.0.10 improves ground-item persistence, but inventory remains the safest place for portable quest results.
Boss FAQ
Short answers for the trigger, location, reward and story requirement.
Blue Shark is triggered with 280-coin Standard Boss Lure (dedicated encounter route). Prepare the fight before consuming or placing the trigger because it may be single-use or quest-critical.
Deliver the body to the Grillmaster to start the grill and unlock cooking.
Blue Shark is encountered on Desert Island. Return the Giant Piranha trophy and follow the yellow Radar marker.
Blue Shark is optional for the main story, but it contributes to collection or side-route progress.