Common Seal vs koala

Phoca vitulina compared with Phascolarctos cinereus

Key Differences

• Common Seal is Near Threatened while koala is Vulnerable.
• Common Seal is carnivore while koala is herbivore.
• Common Seal is 8.0x heavier than koala.
• Common Seal lives longer (30 years vs 15 years).

Taxonomic Classification

Rank	Common Seal	koala
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class same	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Pinnipedia (Seals & Sea Lions)	Diprotodontia (Marsupials)
Family	Phocidae (True Seals)	Phascolarctidae (Koalas)
Genus	Phoca (Harbor Seals)	Phascolarctos (Koalas)
Species	Phoca vitulina	Phascolarctos cinereus

Evolutionary Relationship

Common Seal and koala share a common ancestor at the Class level: Mammalia. (สัตว์เลี้ยงลูกด้วยน้ำนม)

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Seal	koala
Diet	Carnivore	Herbivore
Average Lifespan	30 years	15 years
Average Length	1.7 m	75 cm
Average Weight	80.0 kg	10.0 kg

Habitat & Geographic Range

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Found in Australia. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Seal

The most widely distributed pinniped, harbor seals inhabit temperate and subarctic coastal waters of both the North Atlantic and North Pacific. Adults reach up to 130 kg and spend roughly equal time at sea hunting fish, squid, and crustaceans and hauling out on beaches or rocks to rest. Their large, expressive eyes are adapted for underwater vision in low light. Harbor seals are a critical food source for orcas, sharks, and polar bears.

koala

Iconic marsupial of eastern and southeastern Australia, koalas weigh up to 15 kg and spend up to 22 hours daily sleeping to conserve energy from their low-calorie eucalyptus leaf diet. Highly specialized to process toxic eucalyptus compounds that would kill most other mammals, they have gut microbiomes uniquely adapted for detoxification. Listed as Endangered in 2022, with populations decimated by chlamydia disease, habitat clearing, and climate change.