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Official How to Fish Steam gameplay near Desert Island

Desert Island · required story boss

How to beat Pufferfish in How to Fish

The Desert route boss turns an endangered-species trade into a charging, poison-aware arena fight.

Last verified August 28, 2026

Immediate answer

Pufferfish: trigger, move, reward

On Desert Island, use Carrot obtained from the Tourist trade. Bait a charge, move across its path and attack after the miss. After the fight, secure Pufferfish fin; return it to reveal Rocks Island..

Encounter rolerequired story boss
TriggerCarrot obtained from the Tourist trade
LocationDesert Island

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.

How to trigger Pufferfish

Carrot obtained from the Tourist trade.

Reach Desert Island by following the five-island story route. Return the Giant Piranha trophy and follow the yellow Radar marker.

Preparation checklist

  1. Trade Needlefish, Seahorse or another accepted endangered catch for the Carrot.
  2. Bring sustained ranged damage and a reserve of food.
  3. Pick a loop with solid terrain and room to dodge.

Fight tactics

  1. Bait a charge, move across its path and attack after the miss.
  2. Respect poison space rather than standing still to empty a magazine.
  3. Keep the fin separate from ordinary sale items.
Common pitfall

Do not sell the endangered catch before the Tourist trade, and keep the Pufferfish fin separate from ordinary sale items after the fight.

Reward and what to do next

Pufferfish fin; return it to reveal Rocks Island.

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.

Related Desert Island encounters

OptionalBlue Shark280-coin Standard Boss Lure (dedicated encounter route)

Boss FAQ

Pufferfish questions

Short answers for the trigger, location, reward and story requirement.

How do you trigger Pufferfish in How to Fish?

Pufferfish is triggered with Carrot obtained from the Tourist trade. Prepare the fight before consuming or placing the trigger because it may be single-use or quest-critical.

What do you get for beating Pufferfish?

Pufferfish fin; return it to reveal Rocks Island.

Where is Pufferfish in the How to Fish game?

Pufferfish is encountered on Desert Island. Return the Giant Piranha trophy and follow the yellow Radar marker.

Is Pufferfish required to finish How to Fish?

Pufferfish is part of the required story chain.