Intertidal Gathering

With favorable space at a premium, and intense competition and predation, gathering is a way of life in the intertidal.

Big rocky tide pool, blurry, in the background
Acorn barnacles (foreground) and Pelvetiopsis dominate this high
intertidal scene
A gathering of gulls waits impatiently for me to move on from the Mola mola carcass they were feeding on.

A typical intertidal gathering on a vertical tide pool wall

Note: Little brown barnacles, Chthamalus dalli, featured in the image at the top of this post, don’t pack as tightly as some other barnacles, but they still gather in favorable spaces.