Mako (probably extinct Giant White Shark) tooth. It wasn't really a productive day, though, we only got four teeth total.
Redhead, or a Canvasback? Looks more like a Redhead to me. You can see a blue bill on the one in front.
Buffies are still hanging out, although not in the huge raft they were the last time I saw them.
Brown Pelican. While Pelicans aren't rare in the Bay (far from it, these days), for some reason we rarely see them near our shore.
Lion's Mane Jellyfish, one of several we saw washed up or in shallow water lately. Probably the largest jellyfish in the world:
The largest recorded specimen found, washed up on the shore of Massachusetts Bay in 1870, had a bell with a diameter of 2.3 metres (7 ft 6 in) and tentacles 37.0 m (121.4 ft) long. Lion's mane jellyfish have been observed below 42°N latitude for some time in the larger bays of the east coast of the United States.