🦭 Harbor seal vs Leopard seal 🦭
The leopard seal is about twice as long as the harbor seal. The leopard seal weighs about 4 times as much as the harbor seal.
Getting the animals ready…
| Row | 🦭 Harbor seal | 🦭 Leopard seal |
|---|---|---|
| Size The leopard seal is about twice as long as the harbor seal. | 4.9 to 5.9 ft1.5 to 1.8 m1 | 9.8 to 12 ft3 to 3.8 m2 |
| Top speed Neither has a checked number yet. | no checked number yet | no checked number yet |
| Weight The leopard seal weighs about 4 times as much as the harbor seal. | 181 to 284 lb82 to 129 kg1 | 661 to 1,100 lb300 to 500 kg2 |
| Lives They are about the same. | 25 to 30 years25 to 30 years1 | 26 years26 years2 |
| Eats The harbor seal eats fish; the leopard seal eats meat. | fish, squid and crabs | krill, squid and penguins |
| Lives in They can live in the same kind of place. | cool coasts of the North Atlantic and North Pacific oceans | the pack ice around Antarctica and nearby islands |
Which one? Harbor seal or leopard seal
🏁 Who would win the race?
We don't have a checked top speed for the harbor seal or the leopard seal yet, so there is no race.
We only race. Real animals mostly avoid each other. A race is the only fair contest: who reaches the tree first, by top speed.
10 things to know about Harbor seal vs Leopard seal
- The harbor seal: A seal whose whiskers can feel where a fish has just swum.
- The leopard seal: A big spotted seal that lives around the ice of Antarctica.
- They are the same kind of animal: both are mammals.
- The leopard seal is about twice as long as the harbor seal: 2 against 1.
- The leopard seal weighs about 4 times as much as the harbor seal. That is 1 for the harbor seal and 2 for the leopard seal.
- They are about the same. Usual lifespans: 1 for the harbor seal and 2 for the leopard seal.
- The harbor seal eats fish, squid and crabs. The leopard seal eats krill, squid and penguins.
- The harbor seal lives in cool coasts of the North Atlantic and North Pacific oceans. The leopard seal lives in the pack ice around Antarctica and nearby islands. They can live in the same kind of place.
- The harbor seal: doing fine (Least Concern on the IUCN Red List). 3
- The leopard seal: doing fine (Least Concern on the IUCN Red List). 4
Wow facts
🦭 Harbor seal
- A harbor seal pup can swim soon after it is born.
- Its whiskers can follow the trail a fish leaves in the water.
- Its heartbeat slows down when it dives, to save air.
🦭 Leopard seal
- A leopard seal strains krill from the water with its teeth.
- Female leopard seals are bigger than males.
- It lives in the pack ice around Antarctica.
Questions kids ask about Harbor seal and Leopard seal
Which is bigger, harbor seal or leopard seal?
The leopard seal is about twice as long as the harbor seal: 2 against 1.
Which is heavier, harbor seal or leopard seal?
The leopard seal weighs about 4 times as much as the harbor seal. That is 1 for the harbor seal and 2 for the leopard seal.
Which lives longer, harbor seal or leopard seal?
They are about the same. Usual lifespans: 1 for the harbor seal and 2 for the leopard seal.
What do harbor seal and leopard seal eat?
The harbor seal eats fish, squid and crabs. The leopard seal eats krill, squid and penguins.
Where do harbor seal and leopard seal live?
The harbor seal lives in cool coasts of the North Atlantic and North Pacific oceans. The leopard seal lives in the pack ice around Antarctica and nearby islands. They can live in the same kind of place.
Do harbor seals eat leopard seals?
The harbor seal eats fish, squid and crabs. Leopard seals are not in that list, which comes from its page. And the leopard seal is about twice as long as the harbor seal.
Do leopard seals eat harbor seals?
The leopard seal eats krill, squid and penguins. Harbor seals are not in that list, which comes from its page.
Who would win, harbor seal or leopard seal?
We never show fights, because a fight is not a fair way to compare animals. They can share the same kind of place, and real animals mostly keep out of each other's way. What we can compare is how big, how heavy, how fast, how long they live and what they eat, as above.
📤 Share this pair
The link carries only the two animals’ names: peabody.kids/animals/compare/harbor-seal-vs-leopard-seal
Where these numbers come from
- NOAA Fisheries, checked 30 October 2026.
- University of Michigan Museum of Zoology, Animal Diversity Web: Hydrurga leptonyx (leopard seal), checked 10 November 2026.
- Wikidata, from the IUCN Red List, checked 30 October 2026.
- Wikidata, from the IUCN Red List, checked 10 November 2026.