Fauna
Mammal

Harbour Porpoise

Phocoena phocoena

Also known as Common Porpoise, Puffing Pig, Herring Hog

Harbour porpoises move unobtrusively through shallow coastal waters, surfacing briefly with a subtle puffing sound that earned them historical nicknames like puffing pig. They navigate murky estuaries and tidal bays using rapid high-frequency echolocation clicks rather than acrobatic leaps or aerial displays. Mothers nurse their calves in quiet sheltered bays, relying on a continuous diet of small schooling fish to fuel their high metabolism.

Marine MammalCoastalEcholocating
Harbour Porpoise reference1 / 7
Ecomare/Salko de Wolf / CC BY-SA 4.0 · cc-by-sa
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyAtlantic Herring, European Sprat, Sandeel
Predators
  • Killer Whale
  • Great White Shark
  • Bottlenose Dolphin
ThreatsBycatch in gillnets, marine noise pollution, chemical contaminants, and habitat displacement
HabitatsShallow coastal waters, estuaries, bays, fjords, and tidal river channels
Life span12–24 years
Classification
  1. OrderCetacea
  2. FamilyPhocoenidae
  3. GenusPhocoena
  4. SpeciesPhocoena phocoena
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
What to notice
Look for a small body with a low, triangular dorsal fin rolling smoothly through calm water.
Support conservation
Keep boat speeds low, stay at least 100 meters away, and never steer directly into a surfacing group.
Responsible observation
  • Watch from headlands: High coastal vantage points offer excellent views of their brief low-profile surfacing.
  • Listen carefully: On calm days, their sudden puffing exhalation can often be heard before sighting.
  • Give ample distance: Cut vessel engines and maintain a respectful gap to avoid disrupting feeding.
Related species
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