Take a closer look next time you're walking along the seashore and you may be surprised about what you find – a pointy top shell, a colourful periwinkle or a spired whelk.
Each species has specific patterns and markings, and varies in shape and size, offering clues about the animals' evolution and their day-to-day lives.
Tall, spindly cone up to 3cm long. Common anywhere with muddy sediments except for the south-east coast of England.
- Learn more about seaside species by visiting the Marine Life Information Network
- Take a look at Countryfile's rockpool identification guide
- Get outdoors and explore our shores with a coastal walk
Plump, almost circular shell, 2.5cm in length. Can be pink, yellow, purple and white. Common in estuaries except in the south.
Banded wedge shell
Wedge-shaped shell up to 4cm long in shiny white, yellow-purple or brown. Common on all coasts.
Large shell up to 7.5cm long. Colours range from white to dark-brown. Common on sandy, muddy or stony shores.
Fan-shaped shell with radiating ribs up to 5cm across. Widely distributed in estuaries and sandy bays – up to 10,000 per m².
Familiar conical shell in grey or white with radiating ridges up to 6cm high. Found on rocky shores.
Oval or pear-shaped shell up to 11cm across. The two halves of shell are very different – one smooth and flat, the other rough and concave. Widely distributed but less common on east coast.
Black or grey conical shell up to 5cm in height. Found everywhere, particularly rocky coasts.
Large, brittle shell up to 12cm long with ridges and radiating lines. Dull-white or grey in colour. Largely found on southern shores.
Common Razor clam
Unmistakable slender shell up to 25cm long – very common on sandy bays and estuaries. Often washed up in vast numbers after storms.
Yellow-brown spiralling shell up to 10cm high and 6cm wide. Very common. Mobile, the common whelk preys on small bivalves.
Spired, up to 6cm long, in cream, yellow or grey. Common on all rocky coasts where it feeds on mussels and barnacles.
Small, vari-coloured whorled shell up to 1.5cm – from olive-green to brown, red and yellow. Common wherever kelp occurs.
Grey top shell
Small whorled shell, 1.7cm across. Grey or light-yellow with brown or purple streaks. Common on all coasts.
Purple or blue shell, 5-10cm long when adult. Very common on all coasts on intertidal rocks.
A smooth, golden-brown whorled seashell up to 3cm high. Common on sandy shores.
Painted top shell
Conical violet/pink and brown streaked shell, up to 3cm high. Very common on seaweed-covered rocky shores.
Oval shell up to 5cm long with a large opening underneath, up to half the length of the body. Mostly found on the coasts of southern Britain.
Thick top shell
Turban-like spire up to 3cm in height in green, grey or black. Extremely common on the rocky shores of south-west England and Wales.
Brittle, flattened shell up to 3cm long in shades of pink and yellow. Common on sandy shores.
Fan-shaped with prominent ridges, up to 6cm in length. Widespread on rockier shores.
Illustrations ©Chris Shields
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