Playful family of river otters take a sand bath

A playful family of river otters rolling around in the sand, apparently taking a communal sand bath at Point Reyes National Seashore in California.

"I was hiking in Point Reyes ... in search of river otters," said filmer Jonathan Cade Castle. "After patiently waiting by their lagoon, the whole family came out to play and hunt. They were so entertaining to watch!"