Atlantic Bluefin Tuna vs Polar bear

Thunnus thynnus compared with Ursus maritimus

Key Differences

• Atlantic Bluefin Tuna is Least Concern while Polar bear is Vulnerable.
• Polar bear is 1.8x heavier than Atlantic Bluefin Tuna.
• Atlantic Bluefin Tuna lives longer (40 years vs 25 years).

Taxonomic Classification

Rank	Atlantic Bluefin Tuna	Polar bear
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Actinopterygii (Ray-finned Fish)	Mammalia (mamíferos)
Order	Perciformes (Perch-like Fish)	Carnivora (carnívoros)
Family	Scombridae (Tunas & Mackerels)	Ursidae (Bears)
Genus	Thunnus (Tunas)	Ursus (Bears)
Species	Thunnus thynnus	Ursus maritimus

Evolutionary Relationship

Atlantic Bluefin Tuna and Polar bear share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Atlantic Bluefin Tuna

LC — Least Concern

Trend: Increasing ↑

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic Bluefin Tuna	Polar bear
Diet	Carnivore	Carnivore
Average Lifespan	40 years	25 years
Average Length	2.5 m	2.4 m
Average Weight	250.0 kg	450.0 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.

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Atlantic Bluefin Tuna

O atum-rabilho-do-Atlântico (Thunnus thynnus) é um dos peixes mais grandes, mais rápidos e de maior valor econômico do mundo, com indivíduos que podem ultrapassar 600 quilogramas. Seu estado de conservação é em perigo (EN) e suas populações silvestres diminuíram drasticamente pela sobrepesca, tendo sido leiloado um único exemplar de qualidade por mais de três milhões de dólares no Japão.

Polar bear

O maior carnivoro terrestre da Terra, o urso-polar pode ultrapassar 700 kg e e encontrado pelo gelo marinho artico, do Canada ate a Russia. Mamiferos marinhos altamente especializados que dependem do gelo marinho para cacas de focas e focas-barbadas. Excelentes nadadores capazes de percorrer grandes distancias em aguas abertas. Classificado como Vulneravel, com populacoes sob severa pressao devido a rapida perda de gelo marinho artico causada pelas mudancas climaticas.