Below are a few local barnacles — all species that Darwin himself described (in 1854).
Giant Barnacle (Balanus nubilus)
Pink Volcano Barnacle (Tetraclita rubescens)
[Note the small white barnacle (Balanus glandula) in the lower right corner. Darwin also described this species.]
Chthamalus fissus — Most obvious in the center of the image. I can't wait to tell a story about this species in another post! [Chthamalus dalli is the more common of the two Chthamalus species on Bodega Head. But I'm showing Chthamalus fissus here because Darwin described it.]