Field guide
01Confirm that the Island 3 quest is active
The published story route places Pufferfish behind the Island 3 Tourist and Carrot sequence. That means the fight should be treated as the last part of an active quest chain, not a free boss farm. If the Tourist objective is incomplete, resolve that prerequisite before looking for a new coordinate after the fight.
This guide does not recreate the entire Island 3 route because that would blur several player questions into one article. Its purpose is the common blocker after the boss dies: identifying the right return item and completing the hand-in. Use Island Progression for the wider campaign order.
02Take the Tail, not the loose food drops
The Pufferfish Tail advances the next island. It is a distinct bone-exposed or tail-like piece, which is why it can be confused with the edible material left around the fight. Pick up the visually distinct trophy first and keep it in the inventory until the quest response changes.
Item nicknames in early player reports can vary, so appearance alone is not a substitute for the quest interaction. Do not sell, cook or gamble with the unusual boss piece before trying the NPC. The reliable check is the quest giver accepting the item and the route updating afterward.
03Return to the Island 3 quest giver
A boss kill and a progression clear are separate events in How to Fish. Quests and bosses move players to new islands, but this fight still needs a trophy return. Go back to the relevant Island 3 quest giver with the Tail instead of sailing away immediately.
If the conversation does not advance, first check the held item rather than immediately repeating the fight. A regular meat chunk will not satisfy a trophy hand-in. This small inventory check prevents a difficult encounter from being repeated for a problem that is really a turn-in mistake.
04Look for the new route after the hand-in
The Tail hand-in leads to coordinates for Island 4. Treat the coordinates or updated navigation cue as the signal that the Island 3 chain is complete. Until that appears, the current route has not finished even if Pufferfish is defeated.
Do not publish a fixed map coordinate from a launch-day guide as if it were permanent. The useful player instruction is to finish the NPC interaction, then follow the new in-game navigation information. That stays valid even if a patch changes an interface label or waypoint display.
05Keep the evidence boundary clear
The Tail-to-Island-4 sequence follows the quest-and-boss progression structure, but individual inventory labels can change or appear differently in the live game. This page therefore keeps the broader route separate from uncertain visual names. Finish the quest check before planning the next trip.
No exact Pufferfish health value, damage phase, drop chance or coordinate is claimed here. Those are the details most likely to become stale after updates. A clear hand-in route is more useful than a precise-looking mechanic that cannot yet be confirmed.