Was last Wednesday the last sunny day of the year? It might well have been and so it was good I had taken a day off to drive to the north coast for some rock pool snorkeling at Trevose Head near Padstow. A beautiful, empty beach at Booby’s Bay led to the low cliffs of Trevose Head. I did not make it that far up the headland as there were some deep gullies and the waves were pounding below. If you slip and fall on your head you could be in real trouble on these solo outings, so easy does it. Like St. Agnes and Fistral at Newquay the pools were dominated by Brown fork tuning weed Bifurcaria bifurcata, one of my favourite seaweeds and not a species I have ever seen near Falmouth. In contrast to my local Castle Beach spot, the coral weed Corallina officinalis was not bleached but a deep purple and growing much more vigorously. I lowered myself in some of the deeper pools and although the viz was not the greatest I instantly knew the trip was worth it. I tried to get some overall impressions of the pools. What would be really cool is to try to make panorama photos underwater; I might order an underwater tripod for that! There was some green Ulva, a variety of small red seaweeds and Bushy berry wrack (and a little bit of Bushy rainbow wrack) and Sea oak with the same colour as the tuning fork weed. Many limpets were covered in quite a big variety of seaweeds. Not many shots came out well (due to the strong light, overcast days might actually be better) but it would be fun to do a post just on limpets and their mini-ecosystems of epizoic seaweeds. The pools are teeming with Montagu’s blennies Coryphoblennius galerita, I would say more than 10 per square meter. They are very curious and swim up to you, although the little ones then are so skittish that it is still tricky to get a shot. The fish below was a very good model though, quiff up high. Only through this close-up shot I noticed the strange flaps in the corners of it’s mouth. The blueish spots seem striking but also make for excellent camouflage amidst the coralweed. Beadlet-, Strawberry- and Snakelocks anemones were common and I also spotted large Dahlia anemones and small Daisy anemones. I saw a large (for the species) Gem anemone Aulactinia verrucosa as well. In the sun, my wide angle wetlens diffracts ligth on the subject which usually is not what you want but resulted in an interesting effect in the second image of the retracting anemone.
Finally, the bright red seasquirt Dendrodoa grossularia which I remember seeing before in Falmouth without realising what it was (the squirts are very small and clumped together). A green stalked jellyfish Haliclystus octoradiatus attached to coral weed unfortunately is not in focus but I like the very striking colour contrast. If only I could get my strobe to work and get good macro shots! This has the best north coast rockpooling site so far and I’d love to go back as soon as the weather (and tide) allows!
I now am the proud owner of a nauticam CMC wetlens. It arrived too late for my first encounter with a nudibranch this year, however, it came just in time for a proliferation of stalked jellyfish. These tiny (around one centimeter), sessile relatives of jellyfish are not very well-known, but seem to be getting more popular, see for some other recent finds the other local blogs Cornish Rock Pools and The Marine Enthusiast. To find them, you need to carefully scan seaweeds in rock pools (they are not very picky when it comes to which species they attach themselves to). The key resource for UK (European even) rock poolers is David Fenwick’s Stauromedusae website. Above, the most common species, the Spotted kaleidoscope jellyfish Haliclystus octoradiatus, recognizable by the primary tentacles or anchors (the white ‘balls’ inbetween the tentacles). Below, St. John’s stalked jellyfish Calvadosia cruxmelitensis, with a zoomed out photo and finger nail to give an idea of scale. Finally, two not so good photos of a third species Calvadosia campanulata taken above-water as these were located just below the surface. One more species can be found on mainland Cornwall (the Goblet stalked jellyfish Craterolophus convolvulus) and one on the Scillies (the Horned stalked jellyfish Lucernaria quadricornis, but who knows this species is also present on the mainland). So some more searching to do!
More photography practice lately. I have started to use Photoshop to post-process images, which is hard. I have sat with Thomas Daguerre for a session which was very helpful. For some images, the twiddling is of not much use; the image above of a Bull huss egg case for instance I am pretty happy with as is. Below I have pasted some before and after-Photoshop photo’s. Mostly adjusting highlights and contrast, cropping and playing around with sharpness (in the RAW files), most images tend to be a bit reddish. I have not bothered to tackle the ‘marine snow’ with the Spot Healing brush tool. First, Snakelocks anemones, next, Cocks’ comb Plocamium, then Harpoonweed Asparagopsis armata and an old kelp holdfast covered in feeding Grey topshells Gibbula cineraria. On and under the seaweeds I encounter many interesting tiny animals, but it is hard to take good photo’s without a macrolens. I have pasted a couple photo’s below (none have been edited in any way): the Stalked jellyfish Haliclystus octoradiatus (these can also be reddish or brownish, and can be found on a wide variety of seaweeds), a sponge, a juvenile Snakelocks anemone Anemonia viridis (next to a Flat top shell Gibbula umbilicalis) and the Star ascidian Botryllus schlosseri where I later noticed the fecal pellets underneath. Pooping tunicates, that is what we need more pictures of!Finally, some more before- and after- Photoshop images. The first is the nudibranch Rostanga rubra (‘Red doris’) which was only 5mm or so (see also the tiny Daisy anemone in the background). I shot it today, very cold: 4 degrees, and the water might have been only 8 degrees, brrrr! Next, a closeup of the seaweed Osmundea (see the first photo of this post) which shows its interesting pigmentation. The photo’s are nothing special yet, but I notice I am making progress. Excitingly, I just have ordered a macro wetlens and so hope to get some proper macro photography going soon!