I saw movement in the water from a distance, I assumed it was just a beaver as this location was near a main road and beaver sign was present. Then I realized the beaver was a huge otter. It was making a grunting/huffing noise while raising its head out of the water as I approached slowly. Feeling its aggression towards me, I lowered my self into some tall grass, and hastily took a handful of images. Before long he vanished into the dark water.