Parambikulam seems to have a good population of smooth coated otters last May I spent 3 days there and had 5 different sightings. They can be distinguished from common or Eurasian otters by colour / texture of the fur, the shape of the snout although this can be quite difficult on the field. This was right in front of the guesthouse where I was put up. It completely missed me as I was inside a clump of bamboo and kept staring at my brother who was standing on the driveway. Then it let out an alarm and vanished into the water only to surface on the other bank with three more.
500D, 55-250, 250mm, Ae, f5.6, ISO 1600, 1/80, Shot early in the morning in poor light conditions.