Why the Yorkshire coast is a rockpooler's paradise

Few stretches of British coastline reward a curious family quite like the North Yorkshire shore. Between Staithes and Filey, the sea pulls back over ledges of Jurassic sandstone, shale and hard limestone scars, leaving behind hundreds of shallow, sun-warmed pools that act as temporary homes for an extraordinary range of creatures. The geology is the reason. Where the rock is cracked and layered, water lingers; where it is smooth and shelved, it drains away. That mix of nooks, gullies and weed-draped crevices is exactly what crabs, anemones and starfish need.

You do not require a boat, a licence or any particular expertise. A bucket, a pair of wellies and a willingness to crouch still for five minutes are enough to turn an ordinary beach walk into something children remember for years.

Timing your visit: tides, weather and the best beaches

Rockpooling is a game of timing. Aim for a low spring tide, which occurs roughly twice a month around the new and full moon, when the water retreats furthest and exposes the lower shore. Arrive about an hour before low water and plan to leave an hour after it. Pools found on a neap tide will be shallow and picked over; pools on a big spring tide can be knee-deep and full of life.

Always check a tide table for the specific beach before you set out, and never assume the sea will behave as it did last week. On this coast, a falling tide can turn surprisingly quickly, and a north-easterly swell can send waves further up the rocks than you expect.

Reliable family favourites include:

• Runswick Bay — a wide, sheltered sweep of sand with flat, safe rock platforms at either end.
• Boggle Hole and Robin Hood's Bay — dramatic scars and plenty of weed-covered pools, best explored on a falling tide.
• Cayton Bay and Osgodby — low ledges that reveal a surprising amount of life without demanding a long walk.
• Filey Brigg — a proper adventure at low water, though the rocks are uneven and best suited to older children.
• Sandsend and Saltwick Bay — quieter spots where you may have a whole pool to yourselves.

What you will find in a Yorkshire pool

Even a modest pool can hold a startling variety. Look first at the edges, where weed and gravel meet rock, then peer into the darkest corners.

• Shore crabs — the classic green-brown rockpooler, often hiding under ledges and quick to raise a claw.
• Hermit crabs — soft-bodied tenants living in borrowed whelk and periwinkle shells, forever swapping homes.
• Velvet swimming crabs — smaller, bluish and famously bad-tempered; admire from a distance.
• Beadlet anemones — dark red blobs that open into a ring of tentacles once submerged. Touch nothing; just watch them unfurl.
• Common starfish and brittle stars — often tucked beneath overhangs or clinging to weed.
• Limpets, periwinkles, topshells and dog whelks — the grazers and hunters of the pool wall.
• Blennies and gobies — small, darting fish that will settle if you keep still and shadow the water.
• Prawns, chitons and barnacles — easily overlooked, endlessly interesting under a magnifying glass.

Kit and the gentle handling rule

Less kit is better. A white-bottomed tray or shallow bucket lets children see what they have found, a small net helps catch without crushing, and a magnifying glass transforms a limpets into a spectacle. Wellies with grip are essential, as is a warm layer — the wind off this coast bites even in July.

Handle creatures as little as possible, and only with wet hands. Dry skin damages the delicate surface of anemones, starfish and small fish. Never prise an animal off a rock; if it is holding on, it is telling you something. Scoop crabs from underneath with a cupped hand or let them walk into your tray. Keep the tray in the shade and out of direct sun, and if a creature looks distressed, return it straight away.

The rockpooler's code: put everything back exactly as you found it

This is the single most important habit to teach young explorers. Every animal you meet belongs to that pool, and many are surprisingly fragile. A crab returned to the wrong depth or the wrong type of weed may not survive the next tide.

• Return each creature to the precise spot you took it from — same pool, same depth, same side of the rock.
• If you lift a stone, put it back the same way up, so the weed and barnacles on top are not buried.
• Take nothing home, not even an empty shell; something else may already be using it.
• Empty your bucket gently, in the pool, before you leave.
• Keep dogs and feet out of the pools, and avoid trampling seaweed, which shelters just as much life as open water.

Staying safe on slippery ground

Seaweed on wet rock is genuinely treacherous, so move slowly, keep one hand free and avoid carrying a child and a bucket at the same time. Watch for the returning tide and agree a meeting point on the beach before you scatter. Tell someone where you are going, take a phone in a waterproof case, and remember that this coast has no lifeguards on many of its quieter stretches.

Respect the sea, tread lightly on the shore, and you will leave with muddy knees, a head full of questions and a genuine affection for one of the most productive stretches of water in Britain.