🐟 Salmon Run: Waterfall Leap Ballistics, Burst Swimming Speed and Vertical-Slot Fish Ladder Limits Lab

A salmon accelerates in a plunge pool and leaps a waterfall on a ballistic arc (RK4 with air drag, checked against the closed-form apex, range and best angle), while a vertical-slot fish ladder is limited by jet speed, fatigue and pool turbulence. Water temperature changes muscle power and dissolved oxygen in a cut-away Blender-built river.