How to Fish Walkthrough: Island and Boss Order
Use a clean progression outline from the opening objective through the island chain, later boss encounters, and the final sequence.

Use a clean progression outline from the opening objective through the island chain, later boss encounters, and the final sequence.
DIRECT ANSWER
Complete the opening tasks, prepare for Spider Crab, and finish the related hand-in before treating the boat as the next objective. The Boat Keys guide isolates this early progression check.
The full walkthrough and boss compilation show a route through Spider Crab, Sunfish, Giant Piranha, Blue Shark, Pufferfish, Tuna, Albatross, Goblin Shark, Bowhead Whale, and Mutated Bowhead Whale.
Return to the last objective giver, check whether a unique item is still held by another co-op player, and verify the lobby is running the same current version before repeating the entire fight.
This How to Fish game walkthrough is organized around progression gates rather than every optional catch. Read the active island objective, complete the required interaction, prepare the related boss, collect its reward, and finish the hand-in before moving to the next stage. That pattern explains the route more reliably than memorizing coordinates. The recorded sequence provides visual order, while the current game prompt remains the authority for exact interaction controls and version-sensitive behavior.
Players who want a mostly spoiler-light experience can read only the section matching the current stage. The separate Boat, Islands, and Boss pages isolate common blockers without revealing the entire ending sequence. Players who are deliberately checking the final mission or how to get back to the mainland can use the full route, but should still verify current patch notes when an older skip or trigger behaves differently. A walkthrough should clarify the path, not force the live game to imitate an outdated recording frame for frame.
A route transition is complete only when the required encounter and its follow-up objective are complete. Before using transport, confirm the boss reward was collected, the correct character received it, and the objective text changed. If the boat or next area remains unavailable, return to that transition instead of searching unrelated corners of the map. This is particularly important in the opening Spider Crab sequence, where the fight, unique reward, and boat progression belong to one connected task.
The same logic applies to later islands. An arena victory may create the item needed to trigger another encounter or unlock the next objective. Treat that item as part of the route until its purpose is confirmed. In a co-op lobby, write or say who carries it. When all players leave without checking, the group can mistake an inventory responsibility problem for a missing map location. The Islands page explains the five-stage structure, while individual boss pages cover the timing inside each fight.
Begin at the last point where every player agrees the route advanced. Check the active objective, inventory responsibility, recent hand-in, and lobby version. Revisit the relevant character once before repeating a long boss fight. If a required object remains with another player, bring that player back to the interaction. If the object disappeared or the states disagree, preserve the details and check current Steam news or the developer-linked community for a version-specific issue.
Do not use an old island skip as the default recovery method. Official patch information says a skip was removed, so a historical speed route may no longer represent intended progression. Avoid deleting saves or downloading external fixes for a route question. Separate a genuine black-screen or joining symptom from an objective problem, then use the appropriate Support page if needed. This preserves completed work and keeps the walkthrough focused on progression rather than risky technical changes.
The main route moves from the opening Spider Crab and boat transition into Island 2, then through the Island 3 tourist and Pufferfish chain, the Island 4 Tuna and Albatross chain, and the Island 5 scientist and whale finale. Use this outline to identify the current stage, then read only the focused page for its blocker. Optional fishing, Drip cleanup, skins, and stunt achievements can wait until progression is stable.
At each stage, keep a simple route record: current objective, required bait or item, encounter, reward, recipient, and transport. That list exposes the missing link immediately when the route stops. It also protects co-op sessions because the group can name the carrier before splitting up. When the final tail is returned and the transport objective updates, follow the live prompt for the mainland return instead of searching for an older island skip.
If the recorded walkthrough and live build differ, keep the objective purpose and follow the current prompt. Check official patch notes for removed shortcuts or changed behavior. Do not force the current save to copy an old video exactly. A route guide remains useful when it explains why each transition occurs and sends combat, lure, achievement, and technical questions to the pages designed to answer them.
The referenced all-bosses video documents ten encounters from Spider Crab through Mutated Bowhead Whale.
First confirm the last boss drop or quest item was submitted and the objective text changed. In co-op, check which player picked up that item.
REFERENCE RECORD