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Science & Nature • Marine Mammal

Leopard seal

The leopard seal (*Hydrurga leptonyx*) is a large true seal native to Antarctic and subantarctic waters.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The leopard seal (Hydrurga leptonyx) is a large true seal native to Antarctic and subantarctic waters. It is known for its spotted coat, powerful jaws, and status as a top predator that feeds on penguins, fish, squid, krill, and other seals.

Description

Leopard seals are large, spotted true seals with long bodies, powerful forequarters, and strong jaws. Their common name comes from the dark spots on their coat.

Distribution and habitat

The species is associated mainly with Antarctic pack ice and the surrounding Southern Ocean. Individuals are also recorded at subantarctic islands and, more rarely, farther north in southern hemisphere waters.

Diet and behaviour

Leopard seals are opportunistic carnivores and are among the top predators in their ecosystem. They hunt a wide range of prey and are usually solitary.

Conservation

The leopard seal is currently classified as Least Concern, although population estimates vary across sources. Available information suggests the species remains widespread in its southern range.

Key facts

  • Leopard seals are the only species in the genus Hydrurga.
  • They are one of the largest seal species in the Antarctic region.
  • Their diet includes penguins, fish, squid, krill, and other seals.
  • They are solitary animals and are often described as apex predators.
  • The species is listed as Least Concern on the IUCN Red List.
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Canadian context

Leopard seals are of interest to Canadian readers because they are part of Antarctic and Southern Ocean wildlife, which is relevant to Canadian polar research, climate science, and expedition travel.

Frequently asked questions

What is a leopard seal?
A leopard seal is a large Antarctic true seal species, Hydrurga leptonyx, known for its spotted coat and predatory diet.
Why is it called a leopard seal?
It is named for its dark, leopard-like spots.
Where do leopard seals live?
They live mainly in the Southern Ocean around Antarctica and subantarctic islands, especially near pack ice.
What do leopard seals eat?
They eat penguins, fish, squid, krill, and other seals.
Are leopard seals endangered?
No. The species is listed as Least Concern by the IUCN.
How big are leopard seals?
They typically measure about 2.5–3.5 metres long and can weigh several hundred kilograms.

References

  1. Poseidon Expeditionshttps://poseidonexpeditions.com/about/articles/leopard-seal/
    Supports: Common names, scientific name, family, size, habitat, and population estimate.
  2. National Geographichttps://www.nationalgeographic.com/animals/mammals/facts/leopard-seal
    Supports: Scientific name, diet, size, lifespan, conservation status, and spotted coat name origin.
  3. Antarctic and Southern Ocean Coalitionhttps://www.asoc.org/learn/leopard-seals/
    Supports: Scientific name, length, weight, diet, lifespan, range, and conservation status.
  4. Leopard Seals.orghttps://www.leopardseals.org/fact-sheet/
    Supports: Only species in the genus *Hydrurga*, true seal classification, and population estimate context.