How to Kill Tuna in How to Fish

An assault-type boss: it promises a charge and goes rigid when the charge fails. Island 4 is very small with no kite space, so dodging is not the plan — firepower is.

With no open ground, every failed engagement costs white patience bar. The fight rewards bullet upgrades over movement.

• Upgrade the bullets before summoning — do not expect fancy sidesteps to carry the fight.
• When it charges, answer directly with the shotgun instead of running.
• Keep damage continuous and kill it before the white bar empties.

Pick up the Tuna corpse and place it on the ground — the Albatross will use it as bait. Selling or discarding it breaks the cheapest route into the Island 4 flying boss.

💡 Do not sell the mission loot before checking which NPC or boss wants it.

The documented upgrade priority for small-arena fights: upgrade the bullets before you summon, because bullet tier moves the health bar further than movement moves you. The general shop logic applies — Control upgrades when recoil is spraying your ammo away, Damage upgrades when hits land but the bar crawls. Dynamite (about $25) is a budget burst option against a boss caught on a predictable path, though it never replaces a proper gun.

• Boss never appeared: the Professional Lure purchase or an earlier island task is the blocker, not your aim — finish the local steps and recast.
• It fled: no kite space means the white patience bar is extra tight; drop everything and pour damage the moment it goes rigid after a failed charge.
• Killed it, map unchanged: the Albatross chain expects the corpse on the ground — that is the hand-in for the next fight, not an NPC.