blue whale vs

Balaenoptera musculus compared with Collaria arcyrionema

Key Differences

• blue whale is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	blue whale
Kingdom	Animalia (Animals)	Protozoa (protozoa)
Phylum	Chordata (Chordates)	Mycetozoa
Class	Mammalia (Mammals)	Myxomycetes (Myxomycetes)
Order	Cetacea (Whales & Dolphins)	Stemonitidales
Family	Balaenopteridae (Rorquals)	Stemonitidaceae
Genus	Balaenoptera (Rorquals)	Collaria
Species	Balaenoptera musculus	Collaria arcyrionema

Conservation Status

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

NE — Not Evaluated

Physical Characteristics

Attribute	blue whale
Diet	Carnivore	—
Average Lifespan	90 years	—
Average Length	30.0 m	—
Average Weight	150.0 t	—

Habitat & Geographic Range

blue whale

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.

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, and Sweden.

blue whale

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.

<em>Collaria arcyrionema</em> is a myxomycete — a plasmodial slime mould — belonging to the class Myxomycetes within the phylum Mycetozoa. Slime moulds of the genus Collaria are not true fungi but are instead classified within the group Amoebozoa, reflecting their distinctive biology that combines amoeba-like feeding behaviour with a complex, multi-stage life cycle. <em>Collaria arcyrionema</em> produces small, stalked sporangia — spore-bearing structures — that are characteristic of the genus, typically forming on decaying organic matter such as dead wood, leaf litter, and damp substrate in forested environments. The species has a reported distribution in Brazil, Norway, and Sweden, with occurrence noted across parts of Europe and South America. Like other myxomycetes, <em>Collaria arcyrionema</em> plays a role in nutrient cycling by consuming bacteria and organic detritus during its plasmodial phase. Detailed biological traits including typical lifespan measures and physical dimensions are poorly documented for this species in available literature.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden