Laver spire shell  (Hydrobia ulvae)

Widely distributed around all of the coasts of Britain. It is also found in north-west Europe (2).

This species is found on mudflats, muddy sand, in estuaries (2) and in saltmarshes (1); it is most common on the middle and upper parts of the shore (2), although it has been found at depths of 100 metres (1). It is often associated with sea-grass beds (1).