This is a small cormorant at 50–55 cm length and an 85 cm wingspan. It is mainly black, glossed green, in the breeding season. The wing coverts are silvery. It has a longish tail, a short head crest and a red or yellow face patch. The bill is yellow.
Sexes are similar, but non-breeding adults and juveniles are browner, with a white belly. Some southern races retain the crest all year round.