Joined-fins skate vs Koala

Bathyraja cousseauae compared with Phascolarctos cinereus

Key Differences

• Joined-fins skate is Least Concern while Koala is Vulnerable.

Taxonomic Classification

Rank	Joined-fins skate	Koala
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Elasmobranchii	Mammalia (Säugetiere)
Order	Rajiformes (Rajiformes)	Diprotodontia (Marsupials)
Family	Arhynchobatidae	Phascolarctidae (Koalas)
Genus	Bathyraja	Phascolarctos (Koalas)
Species	Bathyraja cousseauae	Phascolarctos cinereus

Evolutionary Relationship

Joined-fins skate and Koala share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Joined-fins skate

LC — Least Concern

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Joined-fins skate	Koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Joined-fins skate

Habitat

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

Range

Found in Chile.

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.

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.