baleine bleue vs

Balaenoptera musculus compared with Kariarchaeum pelagius

Key Differences

baleine bleue is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	baleine bleue
Kingdom	Animalia (animal)	Archaea (Archaea)
Phylum	Chordata (Chordates)	Asgardarchaeota (Asgardarchaeota)
Class	Mammalia (mammifères)	Heimdallarchaeia (Heimdallarchaeia)
Order	Cetacea (Whales & Dolphins)	UBA460
Family	Balaenopteridae (Rorquals)	Kariarchaeaceae
Genus	Balaenoptera (Rorquals)	Kariarchaeum
Species	Balaenoptera musculus	Kariarchaeum pelagius

Conservation Status

baleine bleue

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

NE — Not Evaluated

Physical Characteristics

Attribute	baleine bleue
Diet	Carnivore	—
Average Lifespan	90 years	—
Average Length	30.0 m	—
Average Weight	150.0 t	—

Habitat & Geographic Range

baleine bleue

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

baleine bleue

The largest animal ever known to have lived on Earth, blue whales can reach 33 meters and 200 tonnes — their hearts alone weigh as much as a small car. Found in all oceans, they migrate between polar feeding grounds and tropical breeding areas. Filter feeders consuming up to 4 tonnes of krill daily. Endangered, with global populations estimated at 10,000–25,000 after near-extinction from 20th-century whaling.

Kariarchaeum pelagius is a member of the DPANN archaea group, representing ultra-small, genomically streamlined organisms found in pelagic marine environments. Like other DPANN archaea, it likely relies on metabolic partnerships with other microorganisms due to its reduced biosynthetic capabilities. Its discovery in open ocean waters extended knowledge of DPANN archaeal diversity beyond sediment and acidic environments.