A stabilizer is releasably attached to a canoe-like boat and includes two floats that are located outside the periphery of the boat. The floats are attached to bars, and lock mechanisms attach the bars to the boat. The bars are releasably attached end-to-end. Each float includes a main float portion. Each float also includes an adjustable float portion and a strap that secures the adjustable float portion either vertically above or vertically below the corresponding main float portion.