Standing at the Shoreline

Hey Alexa, how long can a beaver hold its breath? I’m asking because I was kayaking last night at Totier Creek off the James River and I spotted a beaver swimming from one bank to another, his little head sticking up like a thumb and his body and paddle of a tail cutting a V through the smooth water. And suddenly he went under and never came back up. Believe me, I watched for him in all directions for, like, 10 minutes. The thing was gone.

Alexa didn’t care much about my explanation for the question...