Mystery on the beach

Whew, it's been busy lately.  So, here's a mystery photo for you (below).  Note that this photo is a bit graphic — it's a dead animal that's bloody because birds have been pecking at it.  If you're not interested in seeing something like that, don't continue reading this post.  

This animal washed up near Salmon Creek on 7 August 2018.  

It's rare to see one, so I thought it would be helpful to document it for the record.  I'll reveal more about its identity tomorrow night.