🏝️ All 5 Islands Comparison Guide - How to Fish
Complete island comparison: fish count, bosses, lure tiers, difficulty, economy, time investment, and why Island 3 (Desert) is the most important unlock in the game.
Published August 29, 2026 · Last updated August 29, 2026
Quick Answer: How Do the 5 Islands Compare?
The five islands in How to Fish unlock in a fixed chain: Lighthouse → Forest → Desert → Rocks → Volcano. Each island gates progression behind a boss fight and loot hand-in, with escalating difficulty, bait costs, and rewards. Island 1 is a tutorial; Island 3 unlocks the economy-defining grill; Island 5 is the endgame finale with the toughest bosses and most expensive gear.
| Island | Name | Fish Count | Bosses | Lure Tier | Difficulty | Key Unlock |
|---|---|---|---|---|---|---|
| 1 | Lighthouse | 4 | Spider Crab | Free Lure | Tutorial | Ship Key + Radar |
| 2 | Forest | 9 | Giant Piranha + 2 optional | Free/Beginner | Easy | Island 3 coordinates |
| 3 | Desert | 9 | Pufferfish + Blue Shark | Standard | Medium | Grill unlock (1.5x value) |
| 4 | Rocks | 10 | Tuna + Albatross | Professional | Hard | Final coordinates |
| 5 | Volcano | 6 | Goblin Shark + 2 Whales | Scientific | Very Hard | Game ending |
💡 The most important island is Island 3 (Desert) — defeating the Blue Shark unlocks the grill, which boosts all fish sell prices by 1.5x. This funds the expensive bait and weapons of Islands 4-5.
Island 1 (Lighthouse): The Tutorial Stage
The Lighthouse is a small shoreline map built around the Lighthouse Keeper. It teaches the core loop: fish, sell, gear up, defeat the boss, hand in loot.
| Aspect | Details |
|---|---|
| Fish species | Brown Crab, Rock Crab, Shrimp, Lobster (4 total) |
| Boss | Spider Crab (Easy — tutorial fight) |
| Bait | Free Lure or Hot Dog (~$1) |
| Rod | Crab Fishing Rod (exclusive to this island) |
| Key purchases | Knife ($45), Beer ($12), Basic Fishing Rod ($3) |
| Time to complete | 30-60 minutes |
| Economy | Low — selling crabs and shrimp to the Keeper |
Island 2 (Forest): The First Real Challenge
The Forest (also called the Swamp) mixes a lake, grassland and shops. It introduces the quest-bait system and the first real boss difficulty spike.
| Aspect | Details |
|---|---|
| Fish species | Gar, Mackerel, Piranha, Pike, Goldfish, Cod, Goby, Perch, Triggerfish (9 total) |
| Bosses | Giant Piranha (main), Sunfish + The Old Pike (optional) |
| Bait | Free Lure / Beginner Lure for regulars; Modified Leech (quest) for Giant Piranha |
| Rod | Standard Fishing Rod (Crab Rod only for Piranha exception) |
| Key purchases | Shotgun (~$150), Beginner Lure stock |
| Time to complete | 1-2 hours |
| Economy | Medium — piranhas and larger fish sell for more |
| Special mechanic | 3 ground leeches → Modified Leech (quest bait) |
Island 3 (Desert): The Economy Unlock
The Desert is the most important island for long-term progression. Defeating the Blue Shark unlocks the grill, which boosts all fish sell prices by 1.5x — this funds the expensive bait and weapons of Islands 4-5.
| Aspect | Details |
|---|---|
| Fish species | Salmon, Catfish, Clownfish, Boxfish, Needlefish, Bluegill, Seahorse, Bowlfish, Sea Urchin (9 total) |
| Bosses | Pufferfish (main), Blue Shark (side — unlocks grill) |
| Bait | Standard Lure (~$50) for all regulars; Carrot (quest) for Pufferfish; Standard Boss Lure (~$280) for Blue Shark |
| Rod | Standard Fishing Rod |
| Key purchases | Standard Lure stock, Standard Boss Lure, SMG/Uzi for Pufferfish |
| Time to complete | 2-3 hours |
| Economy | High — grilled fish at 1.5x value covers Island 4-5 bait costs |
| Special mechanic | Needlefish → Carrot → Pufferfish quest chain |
💡 Priority #1 on Island 3: defeat the Blue Shark and unlock the grill before anything else. The 1.5x multiplier funds everything that follows.
Island 4 (Rocks): The Airborne Challenge
The Rocks is the smallest island but features the game's only aerial boss fight. The cramped layout removes kiting options — firepower matters more than movement here.
| Aspect | Details |
|---|---|
| Fish species | Bass, Eel, Red Snapper, Sengarat, Halibut, Tigerfish, Flying Fish, Voxel Fish, Parrotfish, Dripper (10 total) |
| Bosses | Tuna (main), Albatross (aerial — triggered by Tuna corpse) |
| Bait | Professional Lure (~$200) for regulars; Professional Boss Lure (~$350) for Tuna; Tuna corpse for Albatross |
| Rod | Standard Fishing Rod |
| Key purchases | Professional Lure stock, Professional Boss Lure, Sniper/Uzi for Albatross |
| Time to complete | 2-3 hours |
| Economy | High — but bait costs are steep |
| Special mechanic | Tuna corpse → Albatross (only aerial fight) |
Island 5 (Volcano): The Endgame Finale
The Volcano closes the five-island run with the heaviest fights in the game: the routine Goblin Shark, the setup battle against the ordinary Bowhead Whale, and the Mutated Bowhead Whale finale triggered by throwing the whale corpse into the crater.
| Aspect | Details |
|---|---|
| Fish species | Angelfish, Blobfish, Oarfish, Anglerfish, Stonefish, Superdwarf Fish (6 total) |
| Bosses | Goblin Shark (optional), Bowhead Whale (main), Mutated Bowhead Whale (finale) |
| Bait | Scientific Lure (~$500) for regulars; Fish Bucket (quest) for Bowhead Whale; Scientific Boss Lure (~$450) for Goblin Shark |
| Rod | Standard Fishing Rod |
| Key purchases | Scientific Lure stock, Assault Rifle with all upgrade modules |
| Time to complete | 3-5 hours |
| Economy | Very high — but Scientific Lure is expensive |
| Special mechanic | Fish Bucket → Bowhead Whale → throw corpse into crater → Mutated Bowhead Whale |
Economy Comparison: Cost vs Reward
Each island escalates bait costs but also increases fish value. The grill unlock on Island 3 is the inflection point that makes Islands 4-5 profitable.
| Island | Lure Cost | Avg Fish Value | Grill Bonus? | Profit Rating |
|---|---|---|---|---|
| 1 (Lighthouse) | $0-1 | Low | No | ⭐ |
| 2 (Forest) | $0-5 | Medium | No | ⭐⭐ |
| 3 (Desert) | ~$50 | Medium-High | Yes (1.5x) | ⭐⭐⭐⭐⭐ Best value |
| 4 (Rocks) | ~$200 | High | Yes (1.5x) | ⭐⭐⭐ |
| 5 (Volcano) | ~$500 | Very High | Yes (1.5x) | ⭐⭐⭐ |
Difficulty Progression
The islands scale in difficulty, but the biggest spike is Island 4-5 where bait costs triple and bosses require fully upgraded weapons.
- Island 1 (Tutorial): Any melee weapon works. No preparation needed.
- Island 2 (Easy): Shotgun recommended. Bring healing for Giant Piranha.
- Island 3 (Medium): SMG/Uzi for Pufferfish. Blue Shark requires distance fighting.
- Island 4 (Hard): Sniper/Uzi mandatory for Albatross. Tight spaces punish mistakes.
- Island 5 (Very Hard): Assault Rifle with modules required. Both whale fights are marathons.
Time Investment per Island
Total playtime varies by playstyle, but here is the average time to complete each island (including fishing, quests, and boss fights):
| Island | Speedrun | Casual | Completionist |
|---|---|---|---|
| 1 (Lighthouse) | 30 min | 1 hour | 1.5 hours |
| 2 (Forest) | 1 hour | 2 hours | 3 hours |
| 3 (Desert) | 2 hours | 3 hours | 4 hours |
| 4 (Rocks) | 2 hours | 3 hours | 4 hours |
| 5 (Volcano) | 3 hours | 5 hours | 6+ hours |
| Total | 8.5 hours | 14 hours | 18.5+ hours |
Which Island is the Most Important?
Island 3 (Desert) is the single most important island in the game. Here is why:
- Grill unlock: Defeating the Blue Shark unlocks the grill, which boosts all fish sell prices by 1.5x. This is the economy inflection point.
- Funds endgame: The 1.5x multiplier covers the expensive Scientific Lure ($500) and Assault Rifle upgrades of Island 5.
- Quest chain: The Needlefish → Carrot → Pufferfish quest teaches the final island's quest mechanics.
- Boss variety: Two bosses (Pufferfish + Blue Shark) prepare you for the multi-boss islands ahead.
💡 If you skip the Blue Shark on Island 3, Islands 4-5 become a grind. Unlock the grill first — it pays for itself within the first hour of Island 4.