A strange encounter with a beaver, a sea lion, a sea otter, and birds

I was walking on the beach near sheep creek and happened to spot a beaver trying to swim up the creek.  It was low tide so there was not much water in the creek.  I am not sure what it was doing in such a shallow creek that is so close to the ocean.  I was quite surprised.  

We also spotted a sea otter near point retreat while we were out on our boat.  We have never seen sea otters so close to Juneau.