
Spider Crab (first boss)
Use the Empty Beer Can, sidestep the charge and attack during the stagger window.
Prepare the correct bait, control the arena, beat the white escape bar and preserve the trophy that unlocks the next island.

Use the Empty Beer Can, sidestep the charge and attack during the stagger window.

Turn 3 leeches into the Modified Leech, manage the smaller piranhas and keep the skeleton.

Prepare for a major speed and health spike with cover, a repeatable kite route and separate co-op angles.

Use the Tuna body as bait, track the aerial pass and preserve the Albatross Head.

Carry the normal Bowhead Whale to the volcano and keep the Magma Whale fight inside its arena.
If a boss fight shows a second white bar beneath the health bar, that white bar is the escape timer. It drains while the encounter is active; if it empties first, the boss leaves or resets even if its health is nearly gone. Prepare ammunition and healing before spending the trigger, then keep applying safe damage instead of kiting indefinitely.
Current guide evidence supports the white-bar function across later bosses, while Dazed Games has not published one universal number of seconds for every boss, difficulty or lobby. Each boss page now includes the correct retry trigger so a failed timer is not confused with a progression kill.
Universal ruleKeep healing and ammunition ready, identify terrain that breaks a straight charge, and know where you will retreat. After the fight, pick up the distinctive trophy before treating the remaining pieces as food or sale items.
Community code notes from BossHpText report increasing health with more players: one example rises from 562 HP solo to 1,405 with four players. The mod predates Patch 1.0.12 and does not identify that example’s boss or difficulty. See boss health scaling and difficulty before comparing solo and co-op fights.