Eightgill Hagfish vs koala

Eptatretus octatrema compared with Phascolarctos cinereus

Key Differences

• Eightgill Hagfish is Critically Endangered while koala is Vulnerable.

Taxonomic Classification

Rank	Eightgill Hagfish	koala
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Myxini (Myxini)	Mammalia (mammifères)
Order	Myxiniformes (Myxiniformes)	Diprotodontia (Marsupials)
Family	Myxinidae	Phascolarctidae (Koalas)
Genus	Eptatretus	Phascolarctos (Koalas)
Species	Eptatretus octatrema	Phascolarctos cinereus

Evolutionary Relationship

Eightgill Hagfish and koala share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Eightgill Hagfish

CR — Critically Endangered

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Eightgill Hagfish	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Eightgill Hagfish

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.