Gannet or Petrel are both seabirds that belong to the family Procellariidae. They are large, long-winged birds that are found in temperate and tropical oceans around the world. Gannets have a white plumage with black wingtips, while petrels have a more mottled plumage. Both species feed on fish and squid, and can be seen diving into the ocean from great heights. They are also known for their long-distance migrations, often travelling thousands of miles each year.