Atlantic chimaera vs koala

Hydrolagus affinis compared with Phascolarctos cinereus

Key Differences

• Atlantic chimaera is Least Concern while koala is Vulnerable.

Taxonomic Classification

Rank	Atlantic chimaera	koala
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Holocephali (Holocephali)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Chimaeriformes (ปลาคิเมียรา)	Diprotodontia (Marsupials)
Family	Chimaeridae	Phascolarctidae (Koalas)
Genus	Hydrolagus	Phascolarctos (Koalas)
Species	Hydrolagus affinis	Phascolarctos cinereus

Evolutionary Relationship

Atlantic chimaera and koala share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Atlantic chimaera

LC — Least Concern

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic chimaera	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Atlantic chimaera

Habitat

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

Range

Distributed across Chile and Portugal.

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.

Atlantic chimaera

The Atlantic chimaera (Hydrolagus affinis) is a species in the genus Hydrolagus. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and South America, inhabiting ecosystems characteristic of the region.

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.