Atlantic Ancula vs smooth giant clam

Ancula gibbosa compared with Tridacna derasa

Key Differences

• Atlantic Ancula is Least Concern while smooth giant clam is Vulnerable.

Taxonomic Classification

Rank	Atlantic Ancula	smooth giant clam
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Gastropoda (Gastropoda)	Bivalvia (Bivalvia)
Order	Nudibranchia (Nudibranchia)	Cardiida (Cardiida)
Family	Goniodorididae	Cardiidae
Genus	Ancula	Tridacna
Species	Ancula gibbosa	Tridacna derasa

Evolutionary Relationship

Atlantic Ancula and smooth giant clam share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

Atlantic Ancula

LC — Least Concern

smooth giant clam

VU — Vulnerable

Physical Characteristics

Attribute	Atlantic Ancula	smooth giant clam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Ancula

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

smooth giant clam

Habitat

Inhabits tropical and subtropical moist broadleaf forests within the Oceanian biogeographic realm.

Range

Distributed across Marshall Islands and Taiwan. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Atlantic Ancula

The Atlantic Ancula (Ancula gibbosa) is a species in the genus Ancula. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.