Just guessing on the flatworm ID. About an inch long (though they seemed to range from roughly a half-inch to 2 inches), huge populations of them in shallower waters (probably 3-10 feet) all along the west bank of Tomales Bay. Lavender-tinged and fluttered gracefully; looked like little corkscrews at first glance (this guy is resting on a paddle). Thanks!
3" long. Tide pooling group excursion. Low tide. Shell Beach, Sonoma county.
NOT CAPTIVE/CULTIVATED--Found in intertidal zone by a professor at the Bodega Marine Lab and Reserve
Found at low tide in the seagrass by the dock. Moving pretty fast, away from water and we moved it into the rocks after the photo was taken. Unsure of species, it was about the size of a hand.
Found at Portuguese beach in Sonoma county
Lichen on a Barnacle 😳
How to tell Collemopsidium from barnicolous Pyrenocollema?
Collemopsidiomycetes
Collemopsidiales
Xanthopyreniaceae