Atlantic Bluefin Tuna vs common bottlenose dolphin

Thunnus thynnus compared with Tursiops truncatus

Key Differences

• common bottlenose dolphin lives longer (45 years vs 40 years).

Taxonomic Classification

Rank	Atlantic Bluefin Tuna	common bottlenose dolphin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Actinopterygii (Ray-finned Fish)	Mammalia (Mammals)
Order	Perciformes (Perch-like Fish)	Cetacea (Whales & Dolphins)
Family	Scombridae (Tunas & Mackerels)	Delphinidae (Oceanic Dolphins)
Genus	Thunnus (Tunas)	Tursiops (Bottlenose Dolphins)
Species	Thunnus thynnus	Tursiops truncatus

Evolutionary Relationship

Atlantic Bluefin Tuna and common bottlenose dolphin share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Atlantic Bluefin Tuna

LC — Least Concern

Trend: Increasing ↑

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Physical Characteristics

Attribute	Atlantic Bluefin Tuna	common bottlenose dolphin
Diet	Carnivore	Carnivore
Average Lifespan	40 years	45 years
Average Length	2.5 m	3.0 m
Average Weight	250.0 kg	300.0 kg

Habitat & Geographic Range

Atlantic Bluefin Tuna

Habitat

Found across multiple habitat types including temperate coniferous forests, montane grasslands and shrublands, and Mediterranean forests and woodlands within the Palearctic biogeographic realm.

Range

Distributed across Italy, Japan, Morocco, Spain, and United States.

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).

Atlantic Bluefin Tuna

The Atlantic bluefin tuna is one of the largest, fastest, and most valuable fish in the world. A single fish has sold for over $3 million.

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.