How to Beat Pufferfish in How to Fish

Quick answer: Trade an endangered creature to the Tourist on Island 3 to receive the Carrot, use it as bait to summon the Pufferfish, then keep moving around the trees while firing a strong ranged weapon. In the later phase, widen your route to avoid the purple poison. Check the drops and return the Pufferfish trophy to continue.

Fix the exact Pufferfish problem

Problem	Answer
The boss will not appear	Check the Tourist request and active Carrot bait.
You die while aiming	Move first and use trees to interrupt charges.
Purple poison closes your route	Widen the circle and move onto clean ground.
The boss is dead but Island 4 is locked	Keep the Fin and finish the Tourist hand-in.

Pufferfish boss rolling through purple poison between trees — The trees interrupt the Pufferfish's direct path while the purple trail shows why you need clean ground in the later phase. Player capture, Patch 1.0.9; UI shown in Simplified Chinese.

Before you start the fight

The Pufferfish is the main progression boss on the third, Desert island. It is a larger difficulty jump than the earlier fights because its rolling charges punish players who stop to aim, and the later phase makes parts of the arena dangerous.

Need	What to do	Why it matters
Carrot	Complete the Tourist's endangered-creature request	Summons the boss
Ranged damage	Bring an upgraded SMG or another reliable firearm	Lets you attack while retreating
Open inventory space	Do not fill every slot before the fight	Makes the trophy easier to identify and keep
Clear route	Notice the trees and obstacles before casting	Cover breaks up direct charges

How to get the Carrot bait

Reach the Desert Island and find the Tourist sitting under a palm tree.
Accept the request for an endangered creature.
Use the island's normal fishing route and inspect catches before selling them.
Return a catch that the game marks as endangered.
Keep the Carrot the Tourist gives you; it is the Pufferfish trigger.

Do not trust a fixed species list blindlyLaunch-week guides name different endangered catches. The reliable rule is the status shown by the current game build: inspect the creature and use one explicitly marked endangered.

Why the Pufferfish will not spawn

Check the quest chain before spending more time casting. The Tourist must accept a creature explicitly marked endangered, the reward dialogue must finish and the Carrot must be selected as the active bait. A Coconut summons the optional Bing Bong encounter and ordinary bait will not start the Pufferfish fight.

Pufferfish fight strategy

1. Start with space behind you

Equip the Carrot, cast and be ready to move as soon as the boss is on land. Starting with your back against a shack, tree or shoreline makes the first charge much harder to escape.

2. Kite around the trees

Run a wide circle and fire while the Pufferfish turns or reroutes around cover. Do not plant your feet for a perfect burst. Consistent damage while moving is safer than a long stationary spray.

3. Widen the route in the poison phase

As the boss grows, it begins leaving purple poison around the arena. Keep the same move-first rhythm, but stop cutting through the middle of your old route. Watch the ground and move to clean space before committing to another burst.

4. Check every drop

When the fight ends, inspect the remains and keep the trophy item required by the Tourist. Ordinary meat is not a substitute for the progression drop.

Player inspecting a Pufferfish trophy after the boss fight — Inspect the boss remains before leaving the arena. The exact localized item label can differ, but the progression trophy is not ordinary meat.

How to unlock Island 4 after Pufferfish

Inspect the boss remains and pick up the progression trophy or Fin rather than ordinary meat.
Return to the Tourist under the palm tree.
Finish the full hand-in dialogue; defeating the boss alone is not enough.
Confirm that the Rocks Island coordinates appear before leaving Desert Island.

If the fight keeps failingDo not spend another Carrot immediately. Upgrade damage, buy enough ammunition and practise circling the arena before triggering the next attempt. In co-op, nominate one player to keep aggro moving while the others fire from clear angles.

Common mistakes

Trying to finish the fight with melee while the boss is mobile.
Standing still to reload or empty a full magazine.
Backing into the water or a tree because the escape route was not checked first.
Running through old poison during the later phase.
Leaving or selling items before confirming the required boss trophy.

Pufferfish FAQ

What bait summons the Pufferfish?

The Tourist’s Carrot is the quest bait used to start the Pufferfish encounter on the third island.

Why will the Pufferfish not spawn?

The Carrot only comes from completing the Tourist’s endangered-creature request. Confirm the catch is explicitly marked endangered, finish the dialogue and equip the Carrot as the active bait before casting.

What weapon should you use?

A strong ranged weapon is safer than melee. Launch-week reports most often recommend an upgraded SMG because it lets you keep damaging the boss while moving.

Why should you keep the Pufferfish Fin?

The boss trophy is part of progression. Check the drops carefully and return the required trophy to the quest NPC before leaving.

Why is Island 4 still locked after the fight?

The kill is not the final progression step. Pick up the Pufferfish trophy or Fin, return it to the Tourist and finish the hand-in dialogue to receive the Rocks Island coordinates.

Sources and verification

Official How to Fish Steam page — official game loop and progression structure.
PC Gamer Pufferfish strategy — Tourist quest, Island 3 and movement advice.
Mobalytics boss guide — Carrot trigger, poison phase and trophy hand-in.