Seemingly misnamed, pelagic cormorants are rarely seen far from land.
During the breeding season the distinct white flank patches contrast markedly with their black plumage. In bright light the slender neck has a purple iridescent sheen, and the back shines green accenting white filoplumes.
They nest in loose colonies on ledges on vertical cliffs on rocky islands and headlands. It is common year-round along the entire coast and is not found away from salt water.