Tiger Shark
An upgraded rifle is safer for story progress; use tranq only when quality matters.
Best capture method
Tranquilizer + drone. Catch stars measure quality, not rarity. Bring the target back alive whenever its rules allow it, and reserve Recovery Drone charges for large compatible fish.
Restaurant use
Tiger Shark Sushi. Enhance this dish only when its ingredient route is repeatable; a stable Fish Farm supply beats a one-night spike.