Atlantic Bluefin Tuna vs Green Sea Turtle

Thunnus thynnus compared with Chelonia mydas

Key Differences

• Atlantic Bluefin Tuna is Least Concern while Green Sea Turtle is Endangered.
• Atlantic Bluefin Tuna is carnivore while Green Sea Turtle is herbivore.
• Green Sea Turtle lives longer (80 years vs 40 years).

Taxonomic Classification

Rank	Atlantic Bluefin Tuna	Green Sea Turtle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Actinopterygii (Ray-finned Fish)	Reptilia (Reptiles)
Order	Perciformes (Perch-like Fish)	Testudines (Turtles & Tortoises)
Family	Scombridae (Tunas & Mackerels)	Cheloniidae (Sea Turtles)
Genus	Thunnus (Tunas)	Chelonia (Green Sea Turtles)
Species	Thunnus thynnus	Chelonia mydas

Evolutionary Relationship

Atlantic Bluefin Tuna and Green Sea Turtle share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Atlantic Bluefin Tuna

LC — Least Concern

Trend: Increasing ↑

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic Bluefin Tuna	Green Sea Turtle
Diet	Carnivore	Herbivore
Average Lifespan	40 years	80 years
Average Length	2.5 m	1.2 m
Average Weight	250.0 kg	200.0 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.

Green Sea Turtle

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

Range

Distributed across Australia, Brazil, Costa Rica, Indonesia, and Mexico. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Green Sea Turtle

The green sea turtle is one of the largest sea turtles. They are named for the green color of their cartilage and fat, not their shells.