A paddling maneuver to help reduce resistance when paddling through whitewater, by rolling the surfboard upside down (with the fins up), and then holding on to the rails of the surfboard while underwater as the whitewater passes overhead. Used especially with longboards because the board's increased flotation makes "duckdiving" (the preferred method) difficult.

How to: If you’re on a longboard, it will be very difficult or impossible to duck dive your board. You’ll be using the turtle-roll. When you see an oncoming wall of whitewater, paddle straight at it to get some speed, grab your rails and flip the board so you’re beneath it underwater. Hold the board very tight and pull the nose down slightly. Your body will act as an anchor and the wave will pass over the board, keeping you from losing ground. The turtle-roll is a little tricky, but is an essential tool for longboarding. Just make sure you’re holding on tight and you’ll be OK. Remember: if you lose the board, it might hit someone else in the head.