A large plump grey coloured petrel. Breeds on Sub-Antarctic Islands in the Pacific, Atlantic and Indian Oceans. Grey petrels nest in burrows. Can dive to depths of up to 10 metres by using its wings underwater. Since grey petrels can dive so deep and they are attracted to food scraps around fishing boats, there is some concern about the number of grey petrels caught on baited fish hooks, especially in the southern blue-fin tuna fishery.
The occasional grey petrel is seen off Kaikoura in the winter. Grey petrels congregate around fishing boats. They are an offshore species and are unlikely to be seen within 5 miles of the coast. The grey petrel is a inquisitive bird and will put is head underwater and energetically swim around fishing boats looking for food scraps.