Grinning Izak Catshark vs koala

Holohalaelurus grennian compared with Phascolarctos cinereus

Key Differences

• Grinning Izak Catshark is Data Deficient while koala is Vulnerable.

Taxonomic Classification

Rank	Grinning Izak Catshark	koala
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Chordata (สัตว์มีแกนสันหลัง)	Chordata (สัตว์มีแกนสันหลัง)
Class	Chondrichthyes (ปลากระดูกอ่อน)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Carcharhiniformes (อันดับปลาฉลามครีบดำ)	Diprotodontia (Marsupials)
Family	Scyliorhinidae	Phascolarctidae (Koalas)
Genus	Holohalaelurus	Phascolarctos (Koalas)
Species	Holohalaelurus grennian	Phascolarctos cinereus

Evolutionary Relationship

Grinning Izak Catshark and koala share a common ancestor at the Phylum level: Chordata. (สัตว์มีแกนสันหลัง)

Conservation Status

Grinning Izak Catshark

DD — Data Deficient

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Grinning Izak Catshark	koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Grinning Izak Catshark

Habitat

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

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.