Black Hagfish vs common bottlenose dolphin

Eptatretus deani compared with Tursiops truncatus

Key Differences

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

Taxonomic Classification

Rank	Black 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 deani	Tursiops truncatus

Evolutionary Relationship

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

Conservation Status

Black Hagfish

DD — Data Deficient

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Black Hagfish

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).

Black Hagfish

The Black Hagfish (Eptatretus deani) is a species in the genus Eptatretus. Its conservation status is listed as Data Deficient, indicating insufficient data for assessment.

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.