The Little Black Cormorant is a small, all-black cormorant with a greenish sheen to the back and a slender grey hooked bill. When breeding, white feathers appear irregularly about the head and neck, with a whitish eyebrow evident.
They sometimes form large flocks of many hundreds of birds. These flocks can advance over the water surface during ebbing tides, surrounding schools of fish and diving to catch them. Like all cormorants, their feathers are not waterproof and they are regularly seen with outstretched wings, to dry the feathers, after swimming and diving for food. They locate fish from the air and then chase the prey underwater.