Fauna
Species

Atlantic Herring

Clupea harengus

Also known as North Sea Herring, Atlantic Sea Herring, Sild

Atlantic herrings form massive, synchronized schools containing millions of individuals that migrate between feeding, spawning, and wintering grounds across the North Atlantic. They communicate and maintain school cohesion using acoustic signals produced by releasing air from their swim bladders, creating distinct clicking sounds. As a foundational forage fish, they convert zooplankton into energy that sustains deep-sea ecosystems, seabirds, marine mammals, and commercial fisheries.

SchoolingMarinePelagic
—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Diet & preyCopepods, Krill, Small Fish
Predators
  • Atlantic Cod
  • Humpback Whale
  • Grey Seal
ThreatsOverfishing, climate-driven ocean warming, habitat degradation
HabitatsOpen ocean pelagic waters, coastal bays, estuaries
Life span12–20 years
  1. FamilyClupeidae
  2. SpeciesClupea harengus
Range data is not available yet.
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Whale Watching: Look for diving seabirds and boiling water surfaces indicating hunting underneath.
  • Coastal Observation: Visit historical fishing harbors and smokehouses along North Atlantic coasts to learn about their cultural impact.
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