This scale is a multifunction, ultrasonic fish measuring device that doubles as a digital fishing scale. Traditional fish measuring devices require the user to lay a fish on a measuring board or stretch out a conventional measuring device. Well documented research, however, indicates that laying a fish on its side creates considerable damage to internal organs and removes the valuable bacteria fighting slime. The SP now allows you to pick the fish out of the water, weigh it with a corrosion free digital scale, and measure the length without forcing human interaction with its delicate body.