blue whale vs Judas Ear Cassidula

Balaenoptera musculus compared with Ellobium aurisjudae

Key Differences

• blue whale is Vulnerable while Judas Ear Cassidula is Least Concern.

Taxonomic Classification

Rank	blue whale	Judas Ear Cassidula
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Mollusca (มอลลัสกา)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Gastropoda (ชั้นแกสโทรโพดา)
Order	Cetacea (Whales & Dolphins)	Ellobiida (Ellobiida)
Family	Balaenopteridae (Rorquals)	Ellobiidae
Genus	Balaenoptera (Rorquals)	Ellobium
Species	Balaenoptera musculus	Ellobium aurisjudae

Evolutionary Relationship

blue whale and Judas Ear Cassidula share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Judas Ear Cassidula

LC — Least Concern

Physical Characteristics

Attribute	blue whale	Judas Ear Cassidula
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.

Judas Ear Cassidula

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Norway and Taiwan.

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.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇹🇼 Taiwan