I remember the first time I ever saw otter play and slide down a slippery bank into the water. Old Billy knew where they were and took me to them. We sat down silently behind some bushes on the bank of an Indiana stream and pretty soon out came a family of otter and climbed up on the bank and slid down the mud slide over and over again like little children. Nothing looks funnier than an otter having a good time, unless it's a sea otter, which looks even more cherubic.