Mammals comparison

Seal vs Walrus: Key Differences Explained

The short answer

True seals and the walrus both lack external ear flaps, which is where the confusion starts, but they belong to separate families. Phocids cannot rotate their hind flippers forward, so they undulate along the ground, and they swim by sculling the rear end. The walrus can rotate its hind flippers and walk on all fours, carries tusks in both sexes, and feeds on the seabed by locating bivalves with a dense pad of stiff whiskers.

The main difference

True seals are earless pinnipeds that cannot rotate the hind flippers and hunt in mid-water; the walrus, also earless, walks on rotated hind flippers, grows tusks and feeds on the bottom.

Both lack the visible ear flaps that mark the eared seals, so the walrus is routinely filed as a giant true seal, yet its locomotion, dentition and foraging all place it in a family of its own.

At a glance

Comparison of Seal and Walrus across 7 dimensions, with an interpretation of each difference.
What differs	Seal	Walrus	What it means
Family	Phocidae, the true or earless seals, with roughly nineteen species from monk seals to elephant seals	Odobenidae, containing only Odobenus rosmarus	Both lack an external ear flap, yet they sit in different families with long separate histories.
Hind flippers on land	Point permanently backwards and cannot rotate, so movement ashore is a caterpillar-like undulation	Rotate forward beneath the body, so the animal takes weight on them and walks on all fours	This is the clearest functional split and it shows the moment either animal leaves the water.
Tusks	None; the canines are conventional and used to seize prey directly	Elongated upper canines in both sexes, used for hauling out onto ice and for social display	No phocid has anything comparable, so tusks alone settle the identification in adults.Calves and young juveniles have short or barely emerged tusks.
Foraging	Mostly water-column hunting for fish, squid and krill, with a few species taking penguins or other seals	Seabed suction feeding on clams and other soft-bodied invertebrates located by touch	The walrus exploits a food layer that almost no true seal uses.The bearded seal is the phocid that comes closest to a benthic habit.
Skin and hair	Close dense fur over blubber, and pups of several species are born in white lanugo	Sparse bristly hair over thick wrinkled hide, with heavy blubber beneath	The walrus relies on hide and fat where phocids rely on fur and fat together.
Size	An enormous span, from ringed seals near 50-70 kg to southern elephant seal males exceeding 3,000 kg	Very large but not the largest; Pacific walrus males can exceed 1,200 kg	The heaviest pinniped is a true seal rather than the walrus, which surprises most readers.Mass figures move with season, region and measurement method.
Range	Global — Arctic and Antarctic ice, temperate coasts, some lakes, and the subtropical waters of the monk seals	Arctic and subarctic only, over shallow continental shelf	Any earless pinniped outside the Arctic is a phocid, because walruses do not occur there.

Family: SealPhocidae, the true or earless seals, with roughly nineteen species from monk seals to elephant seals
WalrusOdobenidae, containing only Odobenus rosmarus
Both lack an external ear flap, yet they sit in different families with long separate histories.
Hind flippers on land: SealPoint permanently backwards and cannot rotate, so movement ashore is a caterpillar-like undulation
WalrusRotate forward beneath the body, so the animal takes weight on them and walks on all fours
This is the clearest functional split and it shows the moment either animal leaves the water.
Tusks: SealNone; the canines are conventional and used to seize prey directly
WalrusElongated upper canines in both sexes, used for hauling out onto ice and for social display
No phocid has anything comparable, so tusks alone settle the identification in adults.Calves and young juveniles have short or barely emerged tusks.
Foraging: SealMostly water-column hunting for fish, squid and krill, with a few species taking penguins or other seals
WalrusSeabed suction feeding on clams and other soft-bodied invertebrates located by touch
The walrus exploits a food layer that almost no true seal uses.The bearded seal is the phocid that comes closest to a benthic habit.
Skin and hair: SealClose dense fur over blubber, and pups of several species are born in white lanugo
WalrusSparse bristly hair over thick wrinkled hide, with heavy blubber beneath
The walrus relies on hide and fat where phocids rely on fur and fat together.
Size: SealAn enormous span, from ringed seals near 50-70 kg to southern elephant seal males exceeding 3,000 kg
WalrusVery large but not the largest; Pacific walrus males can exceed 1,200 kg
The heaviest pinniped is a true seal rather than the walrus, which surprises most readers.Mass figures move with season, region and measurement method.
Range: SealGlobal — Arctic and Antarctic ice, temperate coasts, some lakes, and the subtropical waters of the monk seals
WalrusArctic and subarctic only, over shallow continental shelf
Any earless pinniped outside the Arctic is a phocid, because walruses do not occur there.

How they are related

Phocidae and Odobenidae are two of the three living pinniped families, the third being Otariidae, the eared seals. Phocids number around nineteen species spread from the Arctic to the Antarctic and into subtropical waters. Odobenidae has a single living species, the walrus, with Atlantic and Pacific subspecies and a sometimes-recognised Laptev population. Fossil odobenids were once far more diverse. Molecular work generally places the walrus nearer the eared seals, despite the shared absence of ear flaps.

A note on naming: Seal in this comparison means the true seals of Phocidae, a family of roughly nineteen species, so that side describes family-level traits, while walrus refers to the single living species Odobenus rosmarus.

Telling them apart

Adults are unmistakable once tusks are visible, and the walrus is far bulkier than almost any phocid. The reliable structural cue is the hind end: a true seal drags its hind flippers behind it and cannot bring them forward, while a walrus tucks them under and walks. Skin differs sharply too, since a phocid is smoothly furred and a walrus shows sparse bristles over deeply wrinkled, often flushed hide. Tuskless calves are the main ambiguity.

No ear flaps, no tusks, smooth fur, dragging the hind flippers along the beach: true seal. No ear flaps but obvious tusks, wrinkled bristly hide, walking on all fours, packed together on Arctic ice: walrus. Anywhere outside the Arctic and subarctic, an earless pinniped is a phocid, because the walrus does not live in temperate or tropical seas at all.

Habitat and distribution

The walrus is confined to Arctic and subarctic shallow shelf waters where the seabed lies within diving reach, and it depends on ice or coastal haul-outs. True seals occupy an enormous range by comparison — Arctic and Antarctic pack ice, temperate coasts, estuaries, some lakes such as Baikal, and the subtropical waters used by Hawaiian and Mediterranean monk seals. Ringed, bearded, harp and hooded seals share Arctic waters with walruses, so overlap is real but limited.

Diet and ecological role

Most true seals hunt in the water column and take fish, squid and crustaceans; the crabeater seal strains krill through elaborately lobed teeth, and the leopard seal takes krill, fish, penguins and young seals. The walrus feeds almost entirely on the bottom, detecting buried bivalves with its whisker pad and drawing the soft parts free with suction produced by a piston-like tongue. The bearded seal is the phocid that comes closest to that benthic habit.

Behaviour

Walruses are among the most physically gregarious of marine mammals, hauling out in dense contact heaps that can number in the thousands, and males produce bell-like underwater sounds when breeding. True seals span the whole social spectrum: solitary ringed seals maintaining breathing holes under ice, loose harbour seal haul-outs on sandbars, and elephant seal beaches where huge males hold harems. Both families come ashore or onto ice to rest, moult and give birth.

Senses and adaptations

Both rely heavily on touch, but for different jobs. Phocid whiskers detect the hydrodynamic wake left by a swimming fish, allowing pursuit in darkness or turbid water. The walrus whisker pad is a dense array of several hundred stiff bristles used as a tactile search tool across the seabed. Both share the diving package — high blood volume, myoglobin-rich muscle and a slowed heart rate on submersion — and both have eyes adapted to low light.

More on this topic: Animal senses and adaptations.

Lifespan and life stages

Neither group has a single figure worth quoting. Walruses are long-lived, commonly reaching their thirties, with age often estimated from growth layers in the teeth. True seal lifespans run from around fifteen to twenty years in some species to thirty or more in others, and males in strongly competitive breeding systems, such as elephant seals, typically live shorter lives than females. Wild survival depends on ice conditions, prey and disease outbreaks regionally.

People and these animals

Both have long relationships with Arctic and coastal peoples, providing meat, hide, oil and, in the walrus's case, ivory, and both were reduced by commercial hunting in past centuries. Subsistence harvest continues under national regulation in several countries. Today the main pressures are ice loss, disturbance at haul-outs, fisheries interaction and entanglement. Both are covered by marine mammal protection laws in numerous jurisdictions, with rules governing approach, feeding and disturbance.

Conservation context

Both face pressure from sea-ice change, though not identically. The walrus depends on ice as a resting platform close to shelf feeding grounds, so ice retreat forces large and disturbance-prone coastal haul-outs. Among true seals, Arctic ice-breeding species face comparable problems, while Mediterranean and Hawaiian monk seals are among the most threatened marine mammals for entirely different reasons. Read the current IUCN Red List entry for each species rather than generalising across a family.

Ice-dependent species are being reassessed as Arctic conditions change, so consult the current IUCN Red List entry for the walrus and for the particular seal species rather than relying on a family-level statement.

What they have in common

Both lack external ear flaps and hear through a simple opening on each side of the head.
Both are blubber-insulated pinnipeds that haul out to rest, moult and give birth.
Both share deep-diving physiology, including high blood volume and a slowed heart rate underwater.
Both were reduced by commercial hunting and both feature in regulated Arctic subsistence harvests in places.

Key differences

True seals cannot rotate the hind flippers forward, while the walrus can and walks on all fours.
The walrus grows tusks in both sexes, and no true seal has anything comparable.
The walrus feeds on seabed bivalves by touch, whereas most phocids hunt in the water column.
Phocids have close dense fur, while the walrus has sparse bristles over thick wrinkled hide.
The walrus is restricted to Arctic and subarctic shelf waters, while true seals occur from the poles to the subtropics.

Where people go wrong

Assuming the walrus is a true seal because neither shows external ear flaps.
Believing the walrus is the heaviest pinniped when southern elephant seal males are larger.
Reading a walrus haul-out heap as distress rather than normal contact-seeking behaviour.
Thinking tusks are the walrus's feeding tool rather than a haul-out aid and social signal.

Frequently asked questions

Is a walrus a true seal?

No. True seals are Phocidae, while the walrus is the only living member of Odobenidae. They share the absence of external ear flaps, which fuels the confusion, but the walrus can rotate its hind flippers forward and walk, grows tusks in both sexes and feeds on the seabed. Molecular studies generally place the walrus closer to the eared seals than to the true seals.

Why can a walrus walk on all fours when a harbour seal cannot?

The pelvis and hind limb arrangement differ. A walrus can rotate its hind flippers forward beneath the body and take weight on them, moving on all fours in the manner of eared seals. Phocid hind flippers are fixed pointing backwards, which makes them efficient sculling propellers in water but leaves the animal undulating its whole body to move across ice or sand.

Is the walrus the largest pinniped?

It is among the largest, with Pacific males exceeding 1,200 kg, but the heaviest pinniped is a true seal: southern elephant seal males can pass 3,000 kg and dwarf a walrus. Northern elephant seals are also very large. So the walrus does not hold the size record, and bulk alone cannot separate it from the biggest phocids.

Do walruses dig up clams with their tusks?

The evidence points elsewhere. Foraging walruses plough the sediment with the muzzle and locate buried bivalves with the whisker pad, then extract the soft parts by suction, leaving the tusks largely uninvolved. The tusks are used to haul the body onto ice and in social display. True seals have nothing comparable and take prey directly with the jaws in the water column.

Do true seals and walruses share the same Arctic waters?

In parts of the Arctic, yes. Ringed, bearded, harp and hooded seals overlap with walruses across northern shelf seas, though they use the habitat differently, with the walrus tied to shallow water where the seabed is reachable. Outside the Arctic and subarctic the overlap ends entirely, because the walrus range does not extend into temperate or tropical seas.

Read the full profiles

Sources and methodology

How this comparison is built: FaunaHub comparisons are assembled from the sourced animal profiles behind them rather than written as standalone claims. Figures such as size, mass, and lifespan are typical ranges that vary by subspecies, population, region, sex, age, and — where relevant — whether an animal lives in the wild or under human care, so they are presented as ranges rather than fixed values. Where a common name covers a group rather than a single species, the page says so instead of implying a species-to-species match. Conservation status changes over time and should be confirmed against the current IUCN Red List. Dimensions that could not be supported from the underlying profiles are omitted rather than filled in.

What this page does not do: it does not rank the two animals, predict the outcome of a confrontation, or present either one as stronger, smarter, or better. It is not veterinary, medical, first-aid, handling, capture, hunting, or pest-control guidance. For an animal in your care, or any situation involving injury, contact a qualified veterinarian, your local wildlife authority, or emergency services.

Sources and further reading

Authoritative references used for general educational context. External links open in a new tab. These sources do not endorse FaunaHub.

UniversityAnimal Diversity Web — Phoca vitulina (harbor seal) — University of Michigan species account
ReferenceBritannica — Seal — family Phocidae — Editor-reviewed encyclopedia entry
Wildlife referenceIUCN Red List of Threatened Species — Authoritative source for current conservation status
UniversityAnimal Diversity Web — Odobenus rosmarus (walrus) — University of Michigan species account
GovernmentNOAA Fisheries — Marine Life — U.S. government science agency for marine species and habitats
ReferenceSmithsonian Ocean — National Museum of Natural History — Smithsonian Institution educational ocean-science resource
UniversityAnimal Diversity Web — University of Michigan Museum of Zoology — Peer-edited reference accounts for animal species

Last updated: 2026-08-04