brackish cockle vs common European cockle

Cerastoderma glaucum compared with Cerastoderma edule

Taxonomic Classification

Rank	brackish cockle	common European cockle
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Mollusca (động vật thân mềm)	Mollusca (động vật thân mềm)
Class same	Bivalvia (Thân mềm hai mảnh vỏ)	Bivalvia (Thân mềm hai mảnh vỏ)
Order same	Cardiida (Cardiida)	Cardiida (Cardiida)
Family same	Cardiidae	Cardiidae
Genus same	Cerastoderma	Cerastoderma
Species	Cerastoderma glaucum	Cerastoderma edule

Evolutionary Relationship

brackish cockle and common European cockle share a common ancestor at the Genus level: Cerastoderma.

Conservation Status

brackish cockle

LC — Least Concern

common European cockle

LC — Least Concern

Physical Characteristics

Attribute	brackish cockle	common European cockle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brackish cockle

Habitat

Inhabits temperate broadleaf and mixed forests within the Palearctic biogeographic realm.

Range

Distributed across Azerbaijan, Belgium, Denmark, Norway, and Sweden.

common European cockle

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Iceland, Norway, and Sweden.

brackish cockle

The Brackish cockle (Cerastoderma glaucum) is a species in the genus Cerastoderma. It is currently classified as Least Concern on the IUCN Red List. Inhabits temperate broadleaf and mixed forests within the Palearctic biogeographic realm.

common European cockle

<em>Cerastoderma edule</em>, the common European cockle, is an intertidal bivalve mollusc in the family Cardiidae, classified as Least Concern by the IUCN Red List. The species is native to European coastal waters and has been documented in Belgium, Denmark, Iceland, Norway, and Sweden, where it typically inhabits sandy and muddy intertidal and shallow subtidal sediments in estuaries, bays, and open coastlines. <em>Cerastoderma edule</em> is a filter feeder, drawing in seawater through its siphons to extract phytoplankton, bacteria, and organic particles. It is recognized by its distinctive ribbed, cream-colored shell with radiating ridges and concentric growth lines. Cockles are a keystone species in many European coastal ecosystems, providing an important food source for shorebirds such as oystercatchers and knots, predatory fish, crabs, and starfish. The species also supports one of the most commercially significant shellfish fisheries in Europe, with large-scale harvesting operations in the UK, the Netherlands, and Ireland. Dense cockle beds stabilize intertidal sediments and contribute to benthic productivity. Population dynamics are closely linked to sea surface temperature, salinity, and sediment availability, making this species a useful indicator of estuarine ecosystem health. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 4 countries:

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