According to the National Park Service, there are "approximately 80 species of mammals, 85 species of fish, 29 species of reptiles and amphibians, and thousands of aquatic and terrestrial invertebrate species" in the Point Reyes National Seashore and 490 species of birds have been spotted. Starting with marine life:
Gooseneck barnacles and mussels.
A bryozoan washed up on the beach.
Ochre sea stars.  The website of the Oregon Coast Aquarium notes that the differences in color ("color polymorphism") may be "based on habitat, genetic variation, or something as straightforward as diet >."
A crab washed up on the beach.  There were many crab claws, legs and shells on the beach as well as bits of sand crabs.
No seals were spotted.

In terms of land-based animals along the beach, I saw one lizard, one possible ant (did not get too close a look at it), and a number of bees.
Bee.
I also saw these tracks.  At the time I thought it might be a mountain lion, but research ruled that out (1, 2); they are likely coyote tracks.

Uninspired seagull photos.  A lot of birds were hovering around the two big rocks off Double Point.
A squadron of pelicans appeared briefly but then headed back in the opposite direction.

See: NPS Point Reyes National Seashore - Animals