Direct answer
Clear a loop around the arena, keep the crab visible, sprint through committed attacks and use recovery windows for damage or revives.

Recommended preparation
The goal is not a mathematically perfect build; it is a loadout that lets you move, recover and finish the hand-in without restarting the island.
- Reliable early weapon
- Enough ammunition for missed shots
- Clear inventory space
- A planned revive route in co-op
Fight plan
- Trigger only when the group is ready.
- Split up so one attack cannot hit everyone.
- Use obstacles to create reload windows.
- Finish the quest hand-in before leaving the island.
Route status: Community route. Avoid selling a named body part, trophy or bait object until the local quest giver rejects it.
Difficulty and co-op adjustment
Patch 1.0.9 added Easy and Hard. Easy reduces creature health by 25% and damage by 50%; Hard increases health and damage by 25%. In co-op, spread out, assign one item carrier, and call reload windows instead of emptying every weapon at once.
Compare all difficulty settings →