Stock photography, photos: Diving River otter Stock photos of River otter swimming underwater. Photograph: © Dick J.C. Klees Click for a larger image and more information Keywords associated with this stock photo: Otter, river otter, Lutra canadensis, mustelid, mustelidae, carnivore, predator, mammal, underwater, water, diving, aquatic, river, creek, USA, U.S.A., Canada, foraging, swimming,