spinescence's Identifications

I happened to catch it leaving the water one of the days I saw it here, just not on camera. I see this animal fairly regularly popping its head up to watch visitors to the park, I thought it was a harbor seal or sea lion which are pretty common for the area until I saw it go into the neighborhood next to the park.
I have found video evidence of a family of otters living in this particular spot dating back to 2021, as well (public posts found on Facebook using keywords “sea otter, Manchester Washington”)