Why Beachcombing Captivates Coastal Living

Beachcombing is one of the quiet pleasures of life by the sea. Every tide wipes the slate clean and deals a fresh hand, and even a stretch of sand you have walked a hundred times can turn up something startling after a winter storm. The secret is knowing where and when to look. The strandline — the dark ribbon of weed, twigs and debris marking the last high water — is where most finds gather, especially after a spring tide has followed a spell of onshore wind. Sandy beaches favour shells and sea glass, shingle beaches hide fossils and worked flint, and estuarine mudflats are the place for drift seeds and old clay pipes.

Walk on a falling tide, keep half an eye on the water behind you, and carry a bag for litter as well as treasure. Beaches reward those who leave them better than they found them.

Mermaid's Purses and Egg Cases

These are the empty egg cases of sharks, skates and rays, and they are the single most satisfying coastal find for beginners because they are identifiable, common and genuinely useful to science. A fresh case is soft and horny; a dried one is stiff, papery and biscuit-coloured. Look for them tangled in weed or half-buried at the strandline.

• Small-spotted catshark — small, translucent and yellowish, with long curly tendrils at each corner. By far the most common find on British shores.
• Thornback ray — roughly postcard-sized and rectangular, with four stiff, pointed horns at the corners. The horns are the giveaway.
• Spotted ray — similar shape but narrower, with a single long horn at each corner rather than two.
• Undulate ray — noticeably wider than it is long, with horns set at the corners.
• Blonde ray — large, broad and pale, with short stubby horns.

If a case still holds a soft yellow yolk, it may contain a developing embryo — return it to the water or leave it where it lies. Dried, empty cases are safe to keep, though reporting them to a national eggcase recording scheme is far more valuable than pocketing them.

Sea Glass, Pottery and Man-made Treasures

Sea glass is glass that has been tumbled by wave and shingle for decades until its edges round and its surface frosts. Genuine pieces feel smooth as a pebble, look slightly pitted under a lens, and are never sharper than a worn coin. Colour tells you its history: green from beer and lemonade bottles, brown from stout and medicine, clear from countless windows and jars, pale blue from old milk of magnesia and cosmetics bottles, and cobalt blue from poison and chemist bottles. Red, orange and yellow are rare enough to be worth a photograph.

Keep an eye out too for sea pottery — often blue-and-white Victorian transferware — along with the white, hollow stems of clay tobacco pipes, worn marbles, and the occasional sea-washed bead. Sharp, fresh edges mean a piece has not been in the water long; leave it a year or two and it will improve.

Shells, Cuttlebone and the Rest of the Strandline

Familiar shells are worth learning properly. Common cockles are ribbed and heart-shaped; mussels are smooth and blue-black; razor shells are long, brittle and sharp enough to cut a finger, so handle them carefully. Whelk shells are large and spiralled, often with a neat hole drilled by a whelk or a crab. Slipper limpets look like half a small shell with a shelf inside, and cuttlefish bone — chalky, white, oval and light as a crisp — is a favourite of every beachcombing child.

One rule matters above all: never take a shell that is still occupied. If it has a soft body, a hermit crab or a live animal inside, put it back where you found it. Empty is fine; alive is not.

Fossils, Flint and Geological Finds

Britain's coast is a geological museum with the roof off. Ammonites, coiled and ribbed, turn up along the Jurassic coast; belemnites — bullet-shaped and known locally as devil's fingers — are common on the Yorkshire coast and in Suffolk; and sea urchins fossilised in flint can be found on almost any shingle beach in the south-east. Shark teeth are rarer, but worth scanning for around Barton-on-Sea and Walton-on-the-Naze.

Collect only from loose beach material, never by hammering into cliffs or bedrock, which is both dangerous and often illegal. Stay away from the base of cliffs, and check tide times before you go.

Recording Your Finds Responsibly

A find becomes far more interesting when it is recorded. Note the date, time, location and a grid reference if you can, plus the weather and the state of the tide. Photograph your specimen against a ruler or a coin for scale, in daylight, and include a view from more than one angle. Most finds can then be released back where they came from — a photograph lasts longer than a dusty box on a shelf.

Be mindful of protected places. Sites designated for their wildlife or geology, and most nature reserves, prohibit removing anything at all, and disturbing the strandline removes habitat for sandhoppers, beetles and the birds that feed on them. Report unusual strandings, tagged fish and ringed birds to the relevant wildlife authority, and take only what you will genuinely treasure. The best beachcombers leave the shore as they found it, bar a little less litter.