Abstract: A fishing bobber or float has an inflated, resilient, spherical housing with a diametrically-extending passageway for threading through a fishing line. Fishing line engaging stoppers are provided for adjustably securing the float along the line. An electrically energized signal device within the housing is activated upon compressional distortion of the housing by an incremental pulling stress exerted upon the line and tackled beneath the float while in use by a fish strike or bite. Inertia damping mechanism is provided within the housing to prevent spurious activation of the signal device upon the occurance of water surface disturbance of the floating bobber. A counteracting spring is also provided for adjusting the threshold of actuation of the signal device to a value just above that imposed upon the tackle by the weight of the bait being used, whether dead or alive.