Atlantic Rock Crab vs blue whale

Cancer irroratus compared with Balaenoptera musculus

Key Differences

• Atlantic Rock Crab is Not Evaluated while blue whale is Vulnerable.

Taxonomic Classification

Rank	Atlantic Rock Crab	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	Cancridae	Balaenopteridae (Rorquals)
Genus	Cancer	Balaenoptera (Rorquals)
Species	Cancer irroratus	Balaenoptera musculus

Evolutionary Relationship

Atlantic Rock Crab and blue whale share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Atlantic Rock Crab

NE — Not Evaluated

blue whale

VU — Vulnerable

Population: ~15.0K

Trend: Increasing ↑

Physical Characteristics

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

Habitat & Geographic Range

Atlantic Rock Crab

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Distributed across Iceland, Norway, and Sweden.

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.

Atlantic Rock Crab

The Atlantic Rock Crab (Cancer irroratus) is a species in the genus Cancer. 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 2 countries:

🇳🇴 Norway 🇸🇪 Sweden