Guide coverage: patches through 1.0.12
How to Fish Island 5: Volcano
This is the final island. Complete the five-creature request for the Fish Bucket, defeat the Bowhead Whale, throw its body into the crater, defeat the mutated whale, and give the Whale Fin to the research NPC to sail home.
Ending walkthrough
- Use the Scientific Lure for the island’s regular fish. Patch 1.0.10 slightly reduced Anglerfish health because it was too tanky; no new number was published. Complete the island NPC request that asks for five creatures to receive the Fish Bucket needed for the Bowhead Whale.
Deliver five creatures to the island NPC. The counter above their head tracks progress toward 5/5. 
After 5/5, take the Fish Bucket from the NPC. They will tell you to go catch the whale. - Install the Fish Bucket on your fishing rod and catch the Bowhead Whale. Before the fight, place food on the ground near the arena so you can eat without spending time changing inventory slots.
Install the Fish Bucket on your fishing rod and cast to hook the Bowhead Whale - During the first fight, stay close beneath the whale while it remains on the ground. Move away when it launches or prepares a body slam. After defeating it, pick up the body and carry it along the path to the crater rim.
The Bowhead Whale fight begins after it takes the Fish Bucket bait 
When the Bowhead Whale reaches the top of its jump, move away before it slams down 
After defeating the Bowhead Whale, pick up its body rather than a meat chunk - Throw the Bowhead Whale into the crater to begin the mutated fight. The mutated whale creates lava pools, so watch the ground and move to a clear area whenever lava appears. Stay close while it is grounded, but move away when it launches.
Carry the Bowhead Whale to the crater rim and throw it in to summon the mutated whale 
The Mutated Bowhead Whale emerges from the crater in an explosion of lava 
Stay close and fire while the mutated whale is on the ground 
Move away as soon as the mutated whale launches into the air 
When the mutated whale is high in the air and about to slam down, keep moving away 
Watch the ground when the mutated whale creates lava, and move to a clear area - After defeating the mutated whale, find the Whale Fin among the drops and give it to the research NPC. Take the military boat keys, board the boat, and drive back to the mainland. This completes the main story and starts the ending credits.
Give the Whale Fin to the research NPC to receive the military boat keys and finish the story
How to continue：After giving the Whale Fin to the research NPC, take the military boat keys and drive back to the mainland. You can continue using the same save afterward to complete collections and achievements.
Creatures available on this island
Base price is the value before individual weight, grilling, roulette, and Killscore multipliers. A dash under “Usable bait” means no bait is required. Health is the solo base value on Normal difficulty. Patch 1.0.10 slightly reduced Anglerfish health; the listed 650 is the pre-patch figure.
| Creature | Base price | Usable bait | Health (HP) | Brief description |
|---|---|---|---|---|
| Blobfish | 1360 | Scientific Lure | 1000 | An aggressive creature that can directly attack players. |
| Oarfish Quest | 1450 | Scientific Lure | 1000 | A quest creature accepted by the desert island NPC in exchange for the Carrot used to catch the Pufferfish. |
| Anglerfish | 1500 | Scientific Lure | 650 | An aggressive volcano catch. Patch 1.0.10 slightly reduced its health because the old amount was too tedious; no new number was published. |
| Stonefish | 1500 | Scientific Lure | 800 | An aggressive creature that can directly attack players. |
| Superdwarf Fish Quest | 1700 | Scientific Lure | 120 | A quest creature accepted by the desert island NPC in exchange for the Carrot used to catch the Pufferfish. |
| Goblin Shark Boss Quest | 6200 | Scientific Boss Lure | 7500 | A quest creature accepted by the desert island grillmaster to unlock the grill. |
| Bowhead Whale Boss | 8000 | Fish Bucket | 20000 | A boss creature that requires weapons and supplies to defeat safely. |
Items available in the shop
The shop keeps selling important equipment from earlier islands. Disable the filter below if you need to replace an older tool or weapon.
| Item | Type | Use | Price |
|---|---|---|---|
 Crab Fishing Rod | Tool | The first-island rod. Attach crustacean bait to catch crabs, lobster, and the Spider Crab boss. | $3 |
| Hot Dog | Bait | Basic crustacean bait for Rock Crab and Lobster. | $1 |
 Boat Radar | Tool | Place it on the boat to see the direction and coordinates of unlocked islands at sea. | $10 |
 Radio | Tool | A portable music player with selectable stations; it has no known progression or combat benefit. | $10 |
 Beer | Tool | Give it to the lighthouse keeper to receive the Empty Beer Can used as Spider Crab boss bait. | $12 |
 Brass Knuckles | Weapon | An inexpensive close-range weapon that needs no ammunition. | $24 |
 Knife | Weapon | A close-range weapon; useful for stabbing the stunned Spider Crab in the back. | $45 |
 Fishing Rod | Tool | The standard rod used with regular and boss lures from the Forest onward. | $3 |
| Beginner Lure | Bait | Inexpensive, and it catches the Forest island’s common fish pool. The fish it catches are mostly low-value, so it is best used to stock up food that restores health. | $3 |
| Beginner Boss Lure | Bait | Special lure for Sunfish and the optional Old Pike boss; it is not the Giant Piranha story bait. | $40 |
 Dynamite | Weapon | Creates a large explosion for killing or collecting several nearby fish at once. | $25 |
 Pistol | Weapon | A cheap early ranged weapon with accurate single shots. | $50 |
 Shotgun | Weapon | Fires multiple pellets and deals heavy damage at close range; strong against early bosses. | $150 |
| Standard Lure | Bait | Catches the Desert island’s regular fish, with a small chance of Blue Shark. | $15 |
| Standard Boss Lure | Bait | Dedicated lure for the Blue Shark optional boss; the Pufferfish story boss uses a Carrot instead. | $280 |
 SMG | Weapon | A rapid full-auto weapon that is good for landing steady damage on the Pufferfish. | $650 |
| Professional Lure | Bait | Catches the Rocks island’s valuable regular fish and can also pull Tuna at low odds. | $50 |
| Professional Boss Lure | Bait | Dedicated Tuna lure. The Tuna is then used to summon the Albatross story boss. | $1200 |
 Sniper Rifle | Weapon | A long-range precision weapon suited to shooting the Albatross from cover. | $3800 |
| Scientific Lure | Bait | Catches the Volcano island’s late-game regular fish. | $500 |
| Scientific Boss Lure | Bait | Dedicated lure for the optional Goblin Shark boss; the Bowhead Whale story boss uses the Fish Bucket. | $5800 |
 Assault Rifle | Weapon | The strongest late-game automatic firearm for sustained damage in the final fights. | $20000 |
Quick answers
What do I have to do on Volcano Island?
This is the final island. Complete the five-creature request for the Fish Bucket, defeat the Bowhead Whale, throw its body into the crater, defeat the mutated whale, and give the Whale Fin to the research NPC to sail home.
How many creatures are on Volcano Island?
7 creatures can be caught here; this page lists the bait and base price for each one.
Which boss is on Volcano Island?
Bowhead Whale — the boss guide covers the bait that summons it and the attack window.