The spider was on the ceiling of the toilet at the beach.
The picture is terrible, but I'm pretty sure about the ID. What else has such a easy to recognize shape?
Young, 1st year bird.
Description: Thallus is calcareous, articulated, light pink to light purple, forming dense tufts to 6 or more cm (2.4 in) tall from a basal crust. Branching is pinnate to verticillate, and dense. Axial segments are 1 mm long and more or less cylindrical. Reproductive conceptacles are located at tips of branches but are rare.
Habitat: This species forms dense mats on emergent bedrock or in tidepools in the mid to low intertidal zones of exposed habitats.
Similar taxa: Corallina frondescens, C. officinalis var. chilensis.
Gall on Arroyo willow (Salix lasiolepis)
This gall is induced by a sawfly (Pontania californica syn. Pontania pacifica)
Bonita Cove, Marin Headlands State Park
Marin County, CA