Brazilian electric ray vs Koala

Narcine brasiliensis compared with Phascolarctos cinereus

Key Differences

• Brazilian electric ray is Near Threatened while Koala is Vulnerable.

Taxonomic Classification

Rank	Brazilian electric ray	Koala
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Elasmobranchii	Mammalia (Säugetiere)
Order	Torpediniformes (Zitterrochenartige)	Diprotodontia (Marsupials)
Family	Narcinidae	Phascolarctidae (Koalas)
Genus	Narcine	Phascolarctos (Koalas)
Species	Narcine brasiliensis	Phascolarctos cinereus

Evolutionary Relationship

Brazilian electric ray and Koala share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Brazilian electric ray

NT — Near Threatened

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brazilian electric ray	Koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Brazilian electric ray

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.

Brazilian electric ray

The Brazilian electric ray (Narcine brasiliensis) is a species in the genus Narcine. It is currently classified as Near Threatened on the IUCN Red List.

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.