Big Finner vs Chalky Macoma

Balaenoptera physalus compared with Macoma calcarea

Key Differences

• Big Finner is Endangered while Chalky Macoma is Least Concern.

Taxonomic Classification

Rank	Big Finner	Chalky Macoma
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Bivalvia (Bivalvia)
Order	Cetacea (Whales & Dolphins)	Cardiida (Cardiida)
Family	Balaenopteridae (Rorquals)	Tellinidae
Genus	Balaenoptera (Rorquals)	Macoma
Species	Balaenoptera physalus	Macoma calcarea

Evolutionary Relationship

Big Finner and Chalky Macoma share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Big Finner

EN — Endangered

Chalky Macoma

LC — Least Concern

Physical Characteristics

Attribute	Big Finner	Chalky Macoma
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big Finner

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 4 distinct biome types within the Neotropic biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (5 countries), and South America (Colombia, Ecuador, Venezuela). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Chalky Macoma

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Big Finner

Big Finner (Balaenoptera physalus) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Chalky Macoma

The Chalky Macoma (Macoma calcarea) is a species in the genus Macoma. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden