Here’s something I’ve never seen before. While I was rockpooling, I lifted a stone and found this little variegated scallop, which is a smaller cousin of the scallops people eat. As I watched it began to open and I guessed it might take a little swim so I took this short video.
All scallops can swim but they don’t do it very often because it takes a lot of energy. I think this one was thought I might be a predator and wanted to swim back to the safety of a rock. It was surprisingly speedy.
Filmed at Hannafore Beach, West Looe, Cornwall on 31 August 2015 during a very low spring tide.
We all love spending time with likeminded people, don’t we? So, when a keen diver from Newquay contacts me to request a guided rockpooling tour, I can’t resist. Unusually for a bank holiday weekend, the sun pushes the clouds away and leaves behind a perfect, calm shore ready for us to explore.
We’ve barely known each other a minute before we’re enthusing about the joys of going slowly and taking the time to look for underwater life. We discover our shared love of nudibranchs (sea slugs – read on, they’re lovely, really!). I assure my new friend that we’ll find plenty of wildlife, including some species few divers ever see, and all with minimum kit, no buoyancy control and a limitless supply of air.
The underside of a painted top shell showing the mother-of-pearl lining
Despite being familiar with edible crabs and velvet swimming crabs from diving, there are several species of intertidal crabs that are new to my guest.(more…)
We’ve been planning this trip since our visitors first came to Cornwall a year ago. They’re determined to try rock pooling having missed out last time. This week the tides are perfect. They live near the sea back home in Essex, but they tell me it’s not the same and I can well believe it.
They’ve never seen a starfish in the wild before. My mission is clear.
Getting stuck in to Cornish rock pooling
With picnic and buckets in hand, we set out, treading gingerly over seaweed and searching among the rocks. Within minutes, our friends are putting yesterday’s hasty tutorial on crabs into practice as they try picking them up safely. They score top marks on this and on working out whether the crabs are male or female from the shape of their tails. We find several species of crustacean, including this large squat lobster.
A squat lobster – galathea squamifera
While our visitors search the shallow pools, finding anemones, fish, prawns and hermit crabs, Other Half and I walk out through slippery gullies towards the sea with Junior, taking photos and collecting interesting creatures for our visitors to see. I find a small rock with a beautiful covering of star ascidian.(more…)
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
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)
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.(more…)
Friday was the ideal day for a Cornish rockpool ramble with warm weather and calm conditions. Over a hundred people joined the Looe Marine Conservation Group rockpool event and I’m sure other rockpooling sessions around the Cornwall were similarly well attended. (Here’s a list of what’s on this summer).
Learning about crabs with a Looe Marine Conservation Group volunteer
There are lots of benefits to having a summer birthday; the sun usually shines, the rock pools shimmer and it’s just about warm enough to put my snorkel on and jump in. The beach has lots of presents in store for me today, including a huge greater pipefish, a cousin of the sea horse, and a rare sea slug. No unwrapping required.
A juvenile Aplysia depilans – a rare sea hare in UK waters.
It’s holiday season , but a little planning and some walking is all that is needed to find a peaceful cove. We set off to Port Nadler in perfect, calm conditions loaded with wetsuits, buckets and an ample picnic.
A typical rock pool at Port Nadler near Looe
Under a rock I spot what I think is a very large anemone, but it looks odd. I’m still trying to puzzle it out when it crawls away, unfurling long ear-like tentacles from its head. It’s a sea hare but more bulky than the ones I normally see (Aplysia punctata).
I think I’ve found a strange anemoneSurprise! It turns into a sea hare.
As it oozes towards me across the rock I’m struck by its face, more like a hippo than a hare with wide flapping ears and a broad snout. Very occasionally larger sea hares, Aplysia depilans, have been found around the southern shores of the UK, and I begin to wonder.
Aplysia depilans – looking more like a sea hippo than a sea hare
I contact experts who have seen them before and they confirm it is a juvenile Aplysia deplians – a rare find and a species I’ve never seen before. Happy birthday to me!
It’s still cold for snorkelling and I only last about a quarter of an hour before my teeth start to chatter, but it’s worth it. After several minutes of seeing nothing but kelp, silt and the occasional two-spot goby, a long snake-like body catches my eye. It’s the unmistakeable shape of a greater pipefish (Syngnathus acus).
The greater pipefish looks out from the weeds
These fish grow to about arm length and have a hexagonal cross-section. This one hardly moves, relying on camouflage for defence, its long nose stretching out over the sand.
Greater pipefish – a cousin of the seahorse
I drift back into shore, and find a compass jellyfish (Chrysaora hysoscella) stranded in the shallows. It takes its name from the beautiful markings on its back, but I don’t go too close – sea nettle is its other common name.
Compass jellyfish – showing its distinctive markings
Back on the shore, I huddle on the sand, wrapped in jumpers and towels, shivering and eating cake. Birthdays don’t get any better than this.
This snakelocks anemone looks like it’s had a fright – the tentacles were being picked up by the current
Up close to a red-eyed velvet swimming crab (Necora puber)
Cornish clingfish eggs – little eyes and noses visible insideA snorkel-scape. Thong weed at Port Nadler near Looe
The summer holidays are a great time to explore the Cornish rock pools. What better way to discover the crabs, fish, starfish, anemones and a host of other animals found around our shores than to join a guided event? You’ll have the experts on hand to tell you all about the animals and how they live and as part of a group, you’ll get to see everyone’s finds.
Here’s a summary of rockpooling and marine events this summer, which are all listed on the Cornwall Wildlife Trust events pages.
If you can’t make it to a group event, my pages on how to rockpool will help you make the most of your trip. Just click on beaches tab above to find a great rockpooling location near you.
Please check the organiser’s site for full details, any booking requirements and changes before attending. In all cases, children must be accompanied by an adult and wear suitable weather protection and footwear.
JULY
24 July – Family Rock Pool Explore at Kingsand. 11.00. Booking essential for this fun rockpooling event for 5-11 year olds with Cornwall Wildlife Trust. Cost: £1 donation to Fox Club.
26 July – Seaweeds and Seaweed Pressing with Angie Gall at Trebah Garden, Helford. 10.00 – 12.30. Booking essential. Suitable for all ages, this workshop is a great chance to meet an expert and learn about seaweeds. Organised by Helford Voluntary Marine Conservation Association.
28 July – Helford Snorkel Safari. Details available on booking – booking essential. A chance for experienced snorkelers and confident swimmers age 8+ to enjoy a guided one-hour snorkel with local experts from Cornwall Wildlife Trust. £5.
29 July – Get Crafty at Polzeath. 10.30 – 12.30. Marine themed arts and crafts with the Polzeath Marine Conservation Group at the Marine Centre in Polzeath. £2 per person (free for members).
31 July – Rockpool Ramble at Spit Beach, Par. 11.30 – 13.30. Join the experts from the Friends of the Fowey Estuary to explore the shore. £2.50 for non-members.
31 July – Rockpool Ramble at Polzeath. 11.30 – 13.30. Booking essential. Join the Polzeath Marine Conservation experts to explore the shore. £2 for non-members.
AUGUST
2 August – Rockpool Photography at Durgan on the Helford14.00 – 16.00. Booking essential. Suitable for families. Find out how to get great shots using your basic camera including phone cameras.
3 August – Beach Treasure Trail near Newquay. 13.00 – 15.00. Booking essential. A fun trail using a treasure map for primary aged children – collect natural materials along the way.
3 August – Beach Treasure Trail near Crantock. 13.00 – 15.00. Booking essential. A fun trail using a treasure map for primary aged children – collect natural materials along the way.
14 August – Mad About Mud at West Looe. 11.00 – 14.00. Booking essential. Join experts from Looe Marine Conservation Group and the Friends of Kilminorth Wood to discover the marine life of the Looe estuary. Suitable for all ages.
16 August – Public Sea Watch near Tintagel. 11.00 – 14.00. Look out for seals, basking sharks, sunfish, dolphins and other marine life with the Cornwall Wildlife Trust experts.
17 August – Beach Games near Newquay. 12.00 – 14.00. Booking essential. Learn about sea creatures then become them as you complete fun games and activities. For primary age children.
17 August – Newquay evening boat safari. 18.00 – 20.00. Booking essential. Discover the coastal and marine wildlife of Newquay with local expert Dave Thomas – birds, seals and more.
18 August – Fowey Marine Day at Fowey Town Quay. 10.00 – 16.00. A day of fun activities including meeting huge crabs with Friends of Fowey Estuary and Cornwall Wildlife Trust.
24-28 August – Seaquest South West Road Show – at various locations. The Seaquest Southwest team will be touring the county, providing nformation, games and activities to teach people about whales, dolphins, sunfish, seals and basking sharks. Details available on request from seaquest@cornwallwildlifetrust.org.uk
29 August – Rummage in a rockpool nr Penzance. 11.30 – 13.30. Booking essential. Join Cornwall Wildlife Trust experts to explore the shore. Suitable for primary aged children.
Have fun! If you know of other events please contact me and I’ll add them – and don’t forget to let me know what wildlife you find this summer.
Cornish Rock Pools Junior has signed up for the Wildlife Trusts’ 30 Days Wild project. Here’s a video of his first challenge – a walk to Millendreath beach in a raging gale.
He loved it and wasn’t at all fazed by the rain and wind. He scored 100% in the online ‘test of wildness’ which was no surprise to anyone.
If you haven’t already done so, get involved and commit to doing something wild every day in June.
It’s not quite warm enough for shorts yet, but there’s sunshine aplenty and a good turnout for Looe Marine Conservation Group’s first summer rockpooling session of the year. As always, the Cornish rock pools don’t disappoint.
My first find of the morning – a ‘plumed Bertha’ Berthella plumula – a sea slug with a small internal shell.
The big creatures are always the star attractions of public events. Today we are lucky enough to find several magnificent spider crabs.
Spider crabs come into the Cornish rock pools in early summer.
These large crabs with their characteristic spiky shells live out at sea for most of the year, but venture into shallower water in the early summer to breed. They get their names from their long, spindly looking legs – although, being crabs, they have ten legs, not eight like the spiders.
Edible crabs can be large and powerful, but are usually placid
Some sizeable edible crabs lurk at the bottom of buckets, but it is the velvet swimming crab that causes the most gasps. These red-eyed crabs, which my son calls devil crabs, are feisty to say the least and as today’s rockpool leader, Matt, goes to pick one up, it raises its claws in defiance.
Velvet swimming crabs are quick to attack.
Matt takes several attempts, but eventually manages to lift it from the bucket and hold it in front of the upturned faces of a circle of children. He points out the paddle-shaped legs that help it to swim and the smooth velvet surface of the shell before swiftly returning it and moving on to more placid creatures.
This rock goby was easier to handle – the yellow top to its fin can clearly be seen here.
Our local vicar has become a staunch regular on these jaunts and, as always, he’s brimming with smiles and enthusiasm. He makes one of the best finds of the day, although only a few of us make it to the tide’s edge over slippery rocks to see the stalked jellyfish.
Lucernariopsis cruxmelitensis – a stalked jellyfish.
This little jelly is in an awkward position to photograph and the tide is rushing in, but we manage to get some pictures. Lucernariopsis cruxmelitensis – it’s a mouthful to say, but I think it’s the most beautiful of our stalked jellies with its wide open profile and delicate decoration of white nematocysts around each arm.
Lucernariopsis cruxmelitensis – the hand in this shot shows just how small these stalked jellies are. One of my favourite Cornish rock pool creatures.
The next jellyfish we find is a little larger, but still only a few centimetres across. It’s so transparent, I can’t tell most of it is there until I feel the curve of it against my fingers.
This week’s mystery jelly – probably an aequorea species – crystal jellyfish.
From the shape and the faint radiating lines around the base of the bell, I think it may be an aequorea species, also known as the crystal jellyfish. We’ve found these before in Looe, but they’re not a common species – or maybe they are but they’re so transparent they’re hard to spot.
Holding the transparent jelly (aequorea/ crystal jelly?)
It’s wonderful to spend a whole morning on the shore without my fingers becoming painfully cold or having to rush home to counteract early signs of hypothermia with hot baths and drinks. I might even risk going out without a coat soon.
Looe’s vicar doing some quality rockpooling.
Summer is definitely on its way and if you’re heading for the shore, group events like this one are the best way to discover the fantastic Cornish rock pools.
See my links page for lovely groups who run events all through the year. Follow Cornish Rock Pools on Facebook for updates.
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Cornish Rock Pools 