A pregnant otter in CA jumped on a surfer's board and wouldn't leave. It took a while, but eventually one of the surfer's friends was able to grab the board and return it.
A 17-year-old girl let her dog out the back door and, BAM! The pup was face to face with an otter....and apparently these little critters are territorial. https://www.youtube.com/watch?v=B2isy5VuH8o Source: WIS News10