koala vs Pacific cupped oyster

Phascolarctos cinereus compared with Crassostrea rhizophorae

Key Differences

• koala is Vulnerable while Pacific cupped oyster is Near Threatened.

Taxonomic Classification

Rank	koala	Pacific cupped oyster
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Mollusca (軟体動物)
Class	Mammalia (哺乳類)	Bivalvia (二枚貝)
Order	Diprotodontia (カンガルー目)	Ostreida (カキ目)
Family	Phascolarctidae (Koalas)	Ostreidae
Genus	Phascolarctos (Koalas)	Crassostrea
Species	Phascolarctos cinereus	Crassostrea rhizophorae

Evolutionary Relationship

koala and Pacific cupped oyster share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Pacific cupped oyster

NT — Near Threatened

Physical Characteristics

Attribute	koala	Pacific cupped oyster
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	75 cm	—
Average Weight	10.0 kg	—

Habitat & Geographic Range

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.

Pacific cupped oyster

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, France, Netherlands, United Kingdom, and Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

koala

オーストラリア東部・南東部を代表する有袋類で、体重は最大15kgに達し、低カロリーのユーカリの葉食から得るエネルギーを節約するために1日最大22時間を睡眠に費やす。他の哺乳類の多くを死に至らしめる有毒なユーカリ成分を処理するために高度に特化しており、解毒に特別に適応した腸内微生物叢を持つ。クラミジア感染症、生息地の伐採、気候変動により個体数が激減し、2022年に絶滅危惧種に指定された。