Walking on the beach

Thousands of empty shells of common cockles (Cerastoderma edule), tellin species (Angulus tenuis, Lutraria lutraria), scallop species, common mussels (Mytilus edulis) and pod razor shells (Ensis siliqua) were scattered on the sandy shore near Rhyll (North Wales Coast).

Rhyll 1

Rhyll 2

We wandered around collecting them and remarking they are very similar to the Mediterranean species. We found also something that we had never seen before on our beaches, called mermaid’s purses. They are the egg capsules of certain non-bony fish (sharks, skates, rays, dogfish) widespread in the Atlantic Ocean. In particular, we found the eggs of Lesser Spotted Dogfish (Scyliorhynus caniculus) that the female attaches to seaweeds by the coiling tendrils at each corner of the eggs.

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References:

  •  Ken Preston-Mafham,(2004) Seashore of Britain & Europe,  Nature Guide – HarperCollins Publishers Ltd., London
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Insegnante di Scienze Naturali (Biologia, Chimica, Geologia, Astronomia) presso la scuola secondaria superiore
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