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 (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order	Pinnipedia (Seals & Sea Lions)	Diprotodontia (雙門齒目)
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. (哺乳動物)

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

分布最广的鳍足类动物港海豹（Phoca vitulina）栖居于北大西洋和北太平洋温带及亚北极沿海水域。成体体重可达130千克，在海中捕食鱼类、鱿鱼和甲壳动物，并在沙滩或礁岩上休息，两者时间大致相当。大而富有表情的眼睛适应于弱光下的水下视觉。港海豹是虎鲸、鲨鱼和北极熊的重要食物来源。

koala

澳大利亚东部和东南部的标志性有袋类动物，体重最大可达15千克，为了节省低热量桉树叶食物所提供的能量，每天最多睡眠22小时。高度特化，能够处理会致大多数其他哺乳动物死亡的有毒桉树成分，拥有专门适应解毒功能的肠道微生物群。因衣原体病、栖息地开发和气候变化导致种群锐减，2022年被列为濒危物种。