Bosses
Boss fights, strategies, and rewards.
Spidercrab
The first boss, guarding the starting island.
Giant Piranha
The second boss, unlocked after clearing Spidercrab.
Pufferfish
The third boss.
Blue Shark
A mini-boss fought on the same island as Pufferfish. Defeating it unlocks grilling.
Mutated Bowhead Whale
The final boss. Named identically across every source checked, and the fight itself is independently confirmed by an official Steam achievement.
The Old Pike
A named boss-style encounter: a large pike fish with its own health bar labeled "The Old Pike."
Albatross
The Island 4 boss: a bird-type creature summoned by placing a caught Tuna on the ground as bait. Its exact name is disputed across sources.
Tuna
A major boss-tier catch on Island 4: both a high-value fish and the item used to summon Albatross.
Goblin Shark
A reported Island 5 boss, summoned with a Scientific Boss Lure.
Bowhead Whale
A reported Island 5 boss, distinct from the (verified) Mutated Bowhead Whale. Defeating it reportedly produces the bait needed for the final boss.
Sunfish
A reported Island 2 boss, summoned with a Beginner Boss Lure alongside The Old Pike.
Bing Bong
A boss name reported by a single source, with no further detail available.