Brown Rat vs Chilean Hagfish

Rattus norvegicus compared with Eptatretus polytrema

Key Differences

• Brown Rat is Least Concern while Chilean Hagfish is Data Deficient.

Taxonomic Classification

Rank	Brown Rat	Chilean Hagfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Myxini (Myxini)
Order	Rodentia (Rodents)	Myxiniformes (Myxiniformes)
Family	Muridae (Mice & Rats)	Myxinidae
Genus	Rattus	Eptatretus
Species	Rattus norvegicus	Eptatretus polytrema

Evolutionary Relationship

Brown Rat and Chilean Hagfish share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Brown Rat

LC — Least Concern

Chilean Hagfish

DD — Data Deficient

Physical Characteristics

Attribute	Brown Rat	Chilean Hagfish
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

Chilean Hagfish

Habitat

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

Range

Found in Chile.

Brown Rat

Brown Rat (Rattus norvegicus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Chilean Hagfish

The Chilean Hagfish (Eptatretus polytrema) is a species in the genus Eptatretus. It is currently classified as Data Deficient on the IUCN Red List. Native to South America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 1 countries:

🇨🇱 Chile