Description: This species can have two forms depending on habitat, in lagoons it is finer with a thin shell, whereas in estuaries it is more solid with a thicker shell. Each valve as 22-28 radiating ribs which are also visible from the inside of the shell.

Habitat: Saline lagoons or occasionally in estuaries.

Distribution: Scattered records from around Britain and Ireland, where there is suitable habitat.

Similar Species: Could be confused with other cockles, especially Cerastoderma edule.

Key Identification Features:

• Thin or solid form depending on location.
• 22-28 radiating ribs.
• Ribs are very visible from inside of shell.
• Found in saline lagoons.

Distribution Map from NBN: Cerastoderma glaucum at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Cerastoderma glaucum at iNaturalist World Species Observations database.

GBIF data for Cerastoderma glaucum

WoRMS: Cerastoderma glaucum at World Register of Marine Species. Accepted name: Cerastoderma glaucum (Bruguière, 1789). AphiaID: 138999.

Classification: Biota; Animalia; Mollusca; Bivalvia; Autobranchia; Heteroconchia; Euheterodonta; Imparidentia; Cardiida; Cardioidea; Cardiidae; Lymnocardiinae; Cerastodermatini; Cerastoderma