Fauna
Mammal

Weddell Seal

Leptonychotes weddellii

Also known as Weddell's Seal

Weddell seals thrive farther south than any other mammal, residing permanently on Antarctic fast ice. They maintain breathing holes through ice meters thick by rasping with specialized teeth, producing loud underwater vocalizations that range from metallic chirps to deep trills. Mothers give birth on the ice surface during spring, nursing pups with rich milk that allows them to double their weight in just weeks.

AntarcticDeep DiverMarine Mammal
Weddell Seal reference1 / 7
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyAntarctic Toothfish, Antarctic Silverfish, Squid
Predators
  • Orca
  • Leopard Seal
ThreatsClimate change, loss of sea ice, fishing gear entanglement
HabitatsAntarctic fast ice, coastal waters, pack ice
Life span20–25 years
Classification
  1. FamilyPhocidae
  2. SpeciesLeptonychotes weddellii
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Large ocean carnivore capable of severe bites; maintain a safe distance on Antarctic fast ice.
Why it is dangerous
Heavy body mass and powerful jaws with sharp teeth can inflict serious injuries if approached closely.
How to recognize a risky encounter
Look for a dark grey coat with silver blotches, small cat-like head, and quiet resting posture on fast ice.
What to do
Give resting seals wide berth and never block their pathway to a breathing hole.
What to notice
Recognized by spotted dark coats and presence near coastal fast ice or research stations.
Support conservation
Observe silently from required distance limits and follow all Antarctic visitor regulations.
Responsible observation
  • Maintain Safe Distance: Stay at least 15 meters away to prevent stress or defensive reactions.
  • Listen Underwater: Place a hydrophone near breathing holes to hear complex vocalizations.
  • Respect Breeding Grounds: Avoid approaching mothers with newborn pups during spring.
Related species
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