I could not get close enough to get a proper identification, but they were gathered in the pilings by the ferry dock.
Beautiful black bird sitting on rock along Nisqually River. This bird is all black except for a small (couple inches) white spot towards it back end. Through binoculars we could see red around the eye of the Cormorant. Another cormorant flew by and dived into the water, but then left afterward. The bird had a yellowish beak. Due to distance no picture could be taken.
The bird family Phalacrocoracidae is represented by some 40 species of cormorants and shags. Several different classifications of the family have been proposed recently, and the number of genera is disputed.