A fish lure includes a soft, fish-shaped body including forward and aft body segments connected by an integrally-formed vertical hinge. A buoyancy-controlling insert is concealed inside the forward body segment. The vertical hinge includes a pair of vertical grooves that extend from the dorsal surface to the ventral surface of the body, defining a hinge web that attaches the forward body segment to the aft body segment. A pair of front hinge surfaces extend between a side of the forward body segment and the hinge, and a pair of rear hinge surfaces extend between a side of the aft body segment and the hinge. The front hinge surface and the rear hinge surface form a hinge angle between 5 and 20 degrees when at rest. Each front and aft hinge surface is angled aft. Water flow past the hinge angle creates flexing of the body at the hinge.