Irrawaddy dolphin vs St. James' shell

Orcaella brevirostris compared with Pecten maximus

Key Differences

• Irrawaddy dolphin is Endangered while St. James' shell is Least Concern.

Taxonomic Classification

Rank	Irrawaddy dolphin	St. James' shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Bivalvia (Bivalvia)
Order	Cetacea (Whales & Dolphins)	Pectinida (Pectinida)
Family	Delphinidae (Oceanic Dolphins)	Pectinidae
Genus	Orcaella	Pecten
Species	Orcaella brevirostris	Pecten maximus

Evolutionary Relationship

Irrawaddy dolphin and St. James' shell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Irrawaddy dolphin

EN — Endangered

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	Irrawaddy dolphin	St. James' shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

St. James' shell

Habitat

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

Range

Widely distributed across Asia (China), Europe (8 countries), and South America (Chile).

St. James' shell

St. James' shell (Pecten maximus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.