Atlantic Bluefin Tuna vs Koala

Thunnus thynnus compared with Phascolarctos cinereus

Key Differences

• Atlantic Bluefin Tuna is Least Concern while Koala is Vulnerable.
• Atlantic Bluefin Tuna is carnivore while Koala is herbivore.
• Atlantic Bluefin Tuna is 25.0x heavier than Koala.
• Atlantic Bluefin Tuna lives longer (40 years vs 15 years).

Taxonomic Classification

Rank	Atlantic Bluefin Tuna	Koala
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Actinopterygii (Ray-finned Fish)	Mammalia (Säugetiere)
Order	Perciformes (Barschartige)	Diprotodontia (Marsupials)
Family	Scombridae (Tunas & Mackerels)	Phascolarctidae (Koalas)
Genus	Thunnus (Tunas)	Phascolarctos (Koalas)
Species	Thunnus thynnus	Phascolarctos cinereus

Evolutionary Relationship

Atlantic Bluefin Tuna and Koala share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Atlantic Bluefin Tuna

LC — Least Concern

Trend: Increasing ↑

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Atlantic Bluefin Tuna	Koala
Diet	Carnivore	Herbivore
Average Lifespan	40 years	15 years
Average Length	2.5 m	75 cm
Average Weight	250.0 kg	10.0 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.

Koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Found in Australia. Currently classified as Vulnerable 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.

Koala

Iconic marsupial of eastern and southeastern Australia, koalas weigh up to 15 kg and spend up to 22 hours daily sleeping to conserve energy from their low-calorie eucalyptus leaf diet. Highly specialized to process toxic eucalyptus compounds that would kill most other mammals, they have gut microbiomes uniquely adapted for detoxification. Listed as Endangered in 2022, with populations decimated by chlamydia disease, habitat clearing, and climate change.