This item for sale is a medium sized beaver puppet in a swimming position and can be pulled through the water.  You simply rig mono-filament to the front and/or back.  It has an open chest cavity to place weights for buoyancy control.  18" from nose to base of tail.  It is an actual on-film puppet built for the film, "Lake Placid".  This puppet actually comes quite close to the audience in the opening sequences of the film.