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Purple topshell

Purple topshell by Paul Naylor

Purple topshell

Also known as the flat topshell, these are one of the most common and colourful sea snails you are likely to see when out on a rockpool safari!

Enw gwyddonol

Steromphala umbilicalis

Pryd i'w gweld

January to December

Species information

Category

Ystadegau

1.6cm high, 2.2.cm across
Common

Ynghylch

These small, highly attractive sea snails are very common across most seashores and shallow waters, spending most of their time grazing on seaweed and rocks. Occasionally, you can see their two striped antennae sticking out when they are on the move.

Sut i'w hadnabod

The flattish shell usually consists of alternating green/grey and purple bands, which tend to fade as the snail gets older. Gently turn the shell over and look for a small hole on the underside, along with the characteristic ‘mother of pearl,’ which all topshells possess.

Dosbarthiad

Found along the southern and western shores of Britain as far north as Scotland and on suitable shores in Ireland.

Roeddech chi yn gwybod?

This topshell’s scientific name ‘umbilicalis’ comes from the large hole on its underside, like a belly button!