Study of the animals, their remains and other life washed up on strandline

The extent that the tide will move up the shore will be marked with a strandline of seaweeds and other debris on the shingle and some of the rocky beaches. If this strandline is not present, the limit of the rising tide has to be deduced from the position of the Barnacles and Limpets on the rock. These animals need to immerse themselves in seawater to feed, but can go for days without feeding when the tide does not come up far enough. When the tide goes out the Acorn Barnacle closes its limestone plates, and the Limpet clamps its shell hard down on to the rock to keep in the moisture until the next high tide.

by  Andy Horton

Strandlines and Beachcombing on Facebook

    Seashells Washed Up at Brighton

Children can collect seashells washed in by the tide and deposited on the strandline. The two halves of mussel shells are the commonest; they are dark blue on the outside with a pearly white interior. However, on southern coasts the creamy-white slipper limpets are also easy to find, their white slipper-like shells contrasting with the darker pebbles. In an hour or so the diligent searcher should be able to find a handful of different marine snails.

Beachcombers (or strandliners) can arrange their shell collection on a computer scanner and transfer the shells directly to an image (see the Strandline Quiz). I would be pleased to receive well arranged collections by EMail as *.JPG images (under 100K in size, scan in at 100 dpi) Please include full details of when and where the shells, remains etc. were discovered.

Strandline Quiz

Mermaid's Purses, Cuttlebones, and Whelk egg cases on Lignite

The strandline



A Good Introduction

The Seashore Naturalist's Handbook
Leslie Jackman

ISBN  0 600 36447 X
This book may be hard to obtain, although it should be available through the Library system.


Flintman on Flint (Link)
Hanover Point, Isle of Wight
Longshore Drift
Molluscs page
Orford Ness:  Coastal Ecology of a Shingle Bank (excellent references)
Seashore Page

World Oceans Day
A Mass Stranding in Torbay
Seeds from the Caribbean
British Marine Life Study Society Home Page
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