Quick answer
On Forest Island, turn three Leeches into Modified Leech bait, cast it at the lake, and keep a lateral movement lane open. Focus ranged damage on Giant Piranha, clear only adds that block you, then return the Skeleton to the quest NPC for Island 3 coordinates.
Summon and prepare
- Collect three Leeches on Forest Island. 2. Hand them to the local quest NPC to receive Modified Leech. 3. Eat, equip your ranged weapon, and choose a shoreline with room to strafe. 4. Cast Modified Leech; the fight starts as soon as the boss is reeled in.
Fight pattern
Giant Piranha can summon smaller Piranhas after taking hits. Move sideways across the shoreline instead of backing into a corner, fire during the turn or leap recovery, and watch the white escape bar so the encounter does not reset.
Weapon and add management
The selected guides report Shotgun or another reliable ranged weapon for the boss, with Brass Knuckles or a low-cost option for close adds. Small Piranhas are pressure, not the objective: remove only those occupying your movement or healing space, then return fire to the boss.
Reward and next route
Pick up the named Giant Piranha Skeleton and hand it back to the same quest NPC. The reported reward is the coordinates for Island 3; do not sell the Skeleton as ordinary drop stock.
Related routes
- bosses — main guide
- walkthrough — preparation guide
- pufferfish — related guide
- spider-crab — related guide
- islands — preparation guide
- weapons — preparation guide