Tag Archives: Rock Pooling

A Window to the Underwater World

The pools sparkle as the sun finally shoulders its way through the February murk. Beneath the surface, the seaweeds are sprouting up, the first sign of spring in the rock pools, and with them come the sea slugs. Many of these minute molluscs choose to spawn in the shallow waters around the shore, where their favourite foods such as sponges, sea squirts and seaweeds are abundant.

A baby sea hare, Aplysia punctata, grazing on seaweed.
A baby sea hare, Aplysia punctata, grazing on seaweed.

How they travel such distances to find mates and lay their eggs here is something of a mystery to me. They are delicate, squishy little things at best, and mere blobs of jelly out of the water. Once in the water, though, they reveal their colours and shapes, and most rockpoolers delight in finding them. Today, I see mostly pale, blobby ones rather than their spectacular cousins, but they are intriguing nonetheless. Continue reading A Window to the Underwater World

Scarlet and Gold Cup Corals -A Treasure Quest

The sea, viewed from the top of the steep valley, is a distant pool of blue decorated with a scattering of rocky islets. Here ‘my people’ (as my other half puts it) gather, unperturbed by the intense hail shower that sweeps over us. We pull on our wellies and waterproofs in the shelter of our car boots until the storm slinks away, uncovering a cleansed sky.

A few years back I hosted a Coastwise North Devon field trip to the south Cornish coast. Today I’ve been invited back for a north Cornwall foray with this dedicated group of marine naturalists. There could be no more serious band of rockpoolers. Should there be any unusual species on this shore, they are about to be discovered.

The walk down the valley to Porth Mear beach never disappoints, even in the muddy aftermath of a hail storm. Our party is accompanied by the trills of the first skylarks of summer and the first swallows dancing over the marshes.

Porth Mear beach at low tide.
Porth Mear beach at low tide.

My main objective today is to photograph the corals. Like so much of our colourful marine life, the scarlet and gold cup coral (Balanophyllia regia) is barely the size of my fingernail and prefers to live in the most awkward spots possible.

When I last found corals here, I crawled into a damp overhang on my belly, discovered the space was too small for my camera’s waterproof casing and removed it so I could hold my camera at arm’s length into the dripping cave (it died soon afterwards). The resulting photos showed blurred bloblets. The colours were lovely but beyond that you had to use your imagination. I suspect my new camera can do better.

Scarlet and gold star coral
My very best blurred bloblet photos from last year…. can I do better?

The water is slow to run out today. A swell is building in advance of a storm and waves are rushing into the gullies that I was hoping to explore; the ones where I last saw the cup corals. Despite that, it’s one of the best tides of the year, and with so many expert eyes on the case it’s not long before a shout goes up and people gather round. 

In a shallow pool at the back of a rocky grotto are dozens of scarlet and gold cup corals, spots of colour as bright as a sunset. Each one has a central disc of fiery orange fringed in rays of saffron yellow tentacles. I can only see this by lying down and pulling myself over the rocks until my head is wedged in the overhang  so deeply that salt water dribbles down my forehead. I have a small head, small enough to wear my child’s bike helmet; just occasionally that’s useful.

Scarlet and gold cup corals growing all along the base of the overhang.
Scarlet and gold cup corals growing all along the base of the overhang.

This time my camera fits easily through the slit in the rocks and after a fair amount of wriggling I find a way to position it in the water and focus. A clear shot of the cup coral, translucent spotted tentacles and all, appears on my screen. I bang my head on the rock in my excitement, then take fifty more photos – just in case.

Scarlet and gold cup coral at Porth Mear
Scarlet and gold cup coral at Porth Mear

I could spend all day here, except that the spray is already breaking over my back from the waves pounding the seaward rocks. Soon the tide will swallow this gully once more. The cup corals need these fierce currents to bring them food, but I wouldn’t last two minutes in them.

More scarlet and gold cup corals
More scarlet and gold cup corals

We carry on our explorations, making more discoveries and enjoying the sunshine, so unexpected after the morning’s hail.

There may be places where the sea shows its treasures more willingly, where large, colourful wildlife swims all around you without having to clamber over slippery rocks, lift boulders or traipse back up a steep hill at the end of the day. But I prefer this. Just as adventure stories would be dull if the quest were over on page one, finding marine treasure would be less fulfilling if you didn’t have to work at it; or so I tell myself.

Finding and managing a decent photo of a scarlet and gold cup coral has taken me nearly forty years. Even now, I’ve only managed it thanks to having ‘my people’ around me, sharing my fascination with these creatures. I couldn’t ask for more.

Scarlet and gold cup coral in a Cornish rock pool
Scarlet and gold cup coral in a Cornish rock pool

A rockpooling warm-up

You might not think that rockpooling is the sort of activity that requires a warm up, but there’s nothing like practice for getting your ‘eye in’. The more and closer you look, the more you’ll see. What better excuse to get out on Cornwall’s beaches before, during and after this week’s massive tides?

I’ve been out on a few family rambles on the local shores the last couple of weeks to make sure I’m ready for some serious rockpooling this weekend (like most weeks, but they don’t complain).

If you’re wondering what you might see if you head down to the shore in the next few days, here are some of the things I’ve been finding…

Go slowly and look closely - this little ring of jelly contains thousands of eggs from a sea lemon (a type of slug).
Go slowly and look closely – this little ring of jelly contains thousands of eggs from a sea lemon (a type of slug).

Continue reading A rockpooling warm-up

Lazy Sunday rockpooling

This time of year when the roads are busy and the beaches packed, the summer can feel anything but relaxing. It’s Sunday today and we’re taking it easy, so what could be better than a stroll to a local cove that’s a bit off the beaten track for a spot of quiet rockpooling. Starfish, sea slugs, fish and stalked jellyfish await me. 

Going slowly and looking at the seaweed can reveal some beautiful encrustations of sea squirts and bryozoans
Going slowly and looking at the seaweed can reveal some beautiful encrustations of sea squirts and bryozoans

It’s always a good idea to move slowly in the rockpools and today I have nothing to rush for. By staring at the seaweed for a very long time, I begin to notice more details and my eye is drawn to a stalked jellyfish. The blobs between the arms are primary tentacles, suckers that the jelly can use to move around.

Stalked jelly Haliclystus ocroradiatus showing its primary tentacles (blobs between the arms)
Stalked jelly Haliclystus ocroradiatus showing its primary tentacles (blobs between the arms)

A little further on I find another species. This one doesn’t have the blobs between the arms and is flecked with pale spots, which contain stinging cells. Continue reading Lazy Sunday rockpooling

The Zen Guide to Rockpooling

  • Pick a quiet day of the week
  • At a quiet time of year
  • On a day with quiet weather
  • Go slowly and quietly
  • Stop. Watch. Let time go

February is a wonderful month for rock pooling in Cornwall. Well, we think so, although we consider a packet of chocolate biscuits a pre-requisite for achieving anything, especially enlightenment, so Continue reading The Zen Guide to Rockpooling

Pirate Rock Pooling Adventure

The leaves are turning, the swallows are no longer dipping over the rock pools, but this long, warm Cornish summer never seems to end. We set sail from Hannafore over a barely rippling sea in the good ship Red Canoe to seek secret beaches, pirate caves and, of course, photos of interesting marine creatures. Continue reading Pirate Rock Pooling Adventure