Harmony in Nucella

Nucella feeds in harmony on their rocky mid and high intertidal grounds. You hardly ever find a loner. Harmony in Nucella, however, means a sight of wreckage for acorn barnacles, Balanus glandula. Nucella drills into the shell and eats the barnacle within.

Nucella and Balanus glandula, rocky intertidal, Oregon coast
Nucella feasting on young barnacles, mostly Balanus glandula

It may be a breach of etiquette to post a violent predator-prey scene in a harmony-themed challenge, but from the Nucella point of view I see harmony.