Koala vs Rusty Catshark

Phascolarctos cinereus compared with Halaelurus sellus

Key Differences

• Koala is Vulnerable while Rusty Catshark is Least Concern.

Taxonomic Classification

Rank	Koala	Rusty Catshark
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Mammalia (Säugetiere)	Chondrichthyes (Knorpelfische)
Order	Diprotodontia (Marsupials)	Carcharhiniformes (Grundhaie)
Family	Phascolarctidae (Koalas)	Scyliorhinidae
Genus	Phascolarctos (Koalas)	Halaelurus
Species	Phascolarctos cinereus	Halaelurus sellus

Evolutionary Relationship

Koala and Rusty Catshark share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Rusty Catshark

LC — Least Concern

Physical Characteristics

Attribute	Koala	Rusty Catshark
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.

Rusty Catshark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

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.