Harbour porpoise

Harbour Porpoise

Harbour Porpoise ©Niki Clear

Harbour porpoise

Scientific name: Phocoena phocoena
Despite being a little shy, these amazing marine mammals can be spotted close to shore in shallow waters. If you do get close, keep an eye out for the loud ‘chuff’ noise they make as they come to the surface to breathe!

Species information

Statistics

Length: 1.4-2m Weight: 55-75kg Average Lifespan: up to 20 years

Conservation status

Protected in the UK under the Wildlife and Countryside Act, 1981, listed under CITES Appendix II and classified as a Priority Species under the UK Post-2010 Biodiversity Framework. Also protected under the Conservation (Natural Habitats, etc.) Regulations (Northern Ireland) 1996

When to see

January to December

About

Harbour porpoise can be easily spotted close to shore in shallow water, either alone or in small groups. They are shy and will avoid boats and jet skis. If you do manage to get close enough you may hear their loud “chuff” noise as they come to the surface for air, this gives them their nickname “puffing pig”! Harbour porpoise give birth to a small calf every 1-2 years.

How to identify

Look out for a small, triangular dorsal fin breaking the surface. Harbour porpoise are small and stocky, with a dark grey back and lighter underbelly. Their faces are rounded and have no beak.

In our area

Scilly's seas abound with wildlife, including a variety of cetacean species including harbour porpoises, common dolphins, minke whales and even bigger species like humpback and fin whales. One of the best ways to see marine mammals is to watch from Scilly's many headlands (like Peninnis or Deep Point on St Mary's, Wingletang on St Agnes, Shipman Head Down on Bryher, Castle Down on Tresco or from the Daymark on St Martin's) or to head out on a WiSE accredited boat operator offshore. Cetaceans don't generally come between the islands, so a trip to the Western Rocks, Eastern Isles or beyond will give you the best opportunities to see them. You can also spot plentiful wildlife on the Scillonian III crossing from Penzance with Isles of Scilly Travel.

Harbour porpoises are very shy compared to their dolphin cousins, so you'll be lucky to see more than a dark fin and a bit of the back breaking the surface once or twice before they disappear. Look beneath diving gannets and big flocks of gulls for a chance to spot fins breaking the surface beneath - both birds and cetaceans will make the most of big shoals of fish or bait balls.

Distribution

Found all around the UK.

Did you know?

Harbour porpoises are eating machines! They are warm-blooded mammals and their small size means they have to feed constantly to keep their body temperature up in our chilly seas. They feed mainly on fish, including sand eels, herring and whiting.