Chilean Hagfish vs common bottlenose dolphin

Eptatretus polytrema compared with Tursiops truncatus

Key Differences

• Chilean Hagfish is Data Deficient while common bottlenose dolphin is Least Concern.

Taxonomic Classification

Rank	Chilean Hagfish	common bottlenose dolphin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Myxini (Myxini)	Mammalia (Mammals)
Order	Myxiniformes (Myxiniformes)	Cetacea (Whales & Dolphins)
Family	Myxinidae	Delphinidae (Oceanic Dolphins)
Genus	Eptatretus	Tursiops (Bottlenose Dolphins)
Species	Eptatretus polytrema	Tursiops truncatus

Evolutionary Relationship

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

Conservation Status

Chilean Hagfish

DD — Data Deficient

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Physical Characteristics

Attribute	Chilean Hagfish	common bottlenose dolphin
Diet	—	Carnivore
Average Lifespan	—	45 years
Average Length	—	3.0 m
Average Weight	—	300.0 kg

Habitat & Geographic Range

Chilean Hagfish

Habitat

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

Range

Found in Chile.

common bottlenose dolphin

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 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

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.

common bottlenose dolphin

The most studied and recognized dolphin species, bottlenose dolphins inhabit warm and temperate oceans worldwide, from coastal shallows to the open sea. Highly intelligent with large brains relative to body size, they demonstrate self-recognition, complex communication, and social learning. They live in fluid fission-fusion societies and cooperate to herd fish. A keystone indicator species for marine ecosystem health.