The family Procellariidae is a group of seabirds.
The procellariids are the most numerous family of tubenoses, and the most diverse. They range in size from the giant petrels, which are almost as large as the albatrosses, to the prions, which are as small as the larger storm-petrels.
They feed on fish, squid and crustacea, with many also taking fisheries discards and carrion.