Blue-back Locust Lobster vs blue whale

Petrarctus brevicornis compared with Balaenoptera musculus

Key Differences

• Blue-back Locust Lobster is Least Concern while blue whale is Vulnerable.

Taxonomic Classification

Rank	Blue-back Locust Lobster	blue whale
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Malacostraca (Crustaceans)	Mammalia (Mammals)
Order	Decapoda (Decapoda)	Cetacea (Whales & Dolphins)
Family	Scyllaridae	Balaenopteridae (Rorquals)
Genus	Petrarctus	Balaenoptera (Rorquals)
Species	Petrarctus brevicornis	Balaenoptera musculus

Evolutionary Relationship

Blue-back Locust Lobster and blue whale share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Blue-back Locust Lobster

LC — Least Concern

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

Attribute	Blue-back Locust Lobster	blue whale
Diet	—	Carnivore
Average Lifespan	—	90 years
Average Length	—	30.0 m
Average Weight	—	150.0 t

Habitat & Geographic Range

Blue-back Locust Lobster

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found in Taiwan.

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.

Blue-back Locust Lobster

The Blue-back Locust Lobster (Petrarctus brevicornis) is a species in the genus Petrarctus. It is currently classified as Least Concern on the IUCN Red List. Typically found in marine, freshwater, and terrestrial environments.

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 1 countries:

🇹🇼 Taiwan