Seashore Safari, Helford Passage with Ruth Williams

Monday, 18th April 2011

If shellfish, crabs and other marine creatures have an early warning system, it must have clicked on ‘Red Alert’ today as the Seashore Safari got underway.  But to no avail.  A horde of searchers, 30 adults and 45 children, with ages ranging from 2 to 80, was advancing over the rocks, armed with nets and buckets.  There was little chance of any creature remaining undetected as sharp eyes and quick hands and nets probed the rock pools and watery gullies; and soon treasured finds were being placed in the buckets and carried to Ruth for identification.

The weather conditions were ideal – a dry, warm, spring day and a slight breeze.  With one of the lowest tides of the year the water was receding fast, leaving the ferry immobile on the sand beside its jetty and allowing us to walk around grounded boats that an hour or so earlier had been riding to buoys.  Limpets, barnacles and mussels on the rocks of the upper shore had closed their shells for the drying out period and beadlet anemones in the small pools had retracted to jelly blobs.  There were topshells in a variety of colours, plus periwinkles, but the main quarry in the larger pools was creatures that moved – small fish including butterfish and different types and sizes of crabs: hermit, shore and velvet swimming crabs, among which was a soft-bodied one that had only recently moulted its outgrown shell.  Easier to capture were small common starfish.  An unusual find was a brown sea hare about 9cm long.

On the lower shore, now uncovered by the receding tide, were abundant sand-encrusted tubes and filigree tentacle umbrellas of the sand mason worm and smaller numbers of peacock worm tubes.  A few marooned scallops were trying to jerk themselves back into the water by slowly opening their shells and then snapping them shut.  Other shells, mostly empty, included native and Pacific oyster, razor shells, chiton, whelk, cockle and slipper limpets.  Gradually the party thinned as parents and children left for lunch, but not before they had thanked Ruth warmly for a very enjoyable and rewarding outing – and one mother took the opportunity to confirm that she had collected the right seaweed to add to her salad!

The HMCG wishes to express its appreciation to Ruth for leading an extremely successful trip.

 

Similar Posts

  • Non-native Marine Invasive Species (Guy Baker)

    Saturday, 26th February 2011
    “You should clean your bottom every year”! Australians and New Zealanders are known for plain speaking, but this seemed unnecessarily rude. However, just to clarify, they were talking in this instance about the hull of your boat. The point was quickly driven home by an underwater film, taken in N.France, which showed a hull so thickly coated with weeds and invertebrates that it looked like a sagging roll of shaggy carpet. Boat fouling is a worldwide problem and marinas and harbours are important staging posts in the process, because hulls, piers and jetties provide numerous firm surfaces on which sessile plants and animals can gain a foothold.

  • Dawn Chorus Beside Polwheveral Creek

    22 April 2007
    An early start did not deter an eager band of some 28 people armed with binoculars converging on Goongillings Farm where a delicate grey mist swirled amongst the trees edging the creek. The expertise of Martin Rule, the group leader was much appreciated in recognising the songs of the unseen vocalists. Charles and Barbara Pugh rounded a very successful expedition with hot drinks and refreshments amid requests for an even earlier start next year!!

  • Leatherback turtles and their jellyfish prey (Dr Matt Witt)

    31st March 2012

    Of the 7 species of marine turtles, 3 are seen regularly in UK waters: the Leatherback, Loggerhead and Kemp’s Ridley turtles. However, Britain also has interests in overseas waters, such as the Caribbean, and so the work of the Marine Turtle Research Group of Exeter University, based at Tremough, encompasses the world’s oceans. For our speaker, Dr Matthew Witt, the principal study area has been the beaches of Gabon, West Africa. Secluded and little frequented, (although with oilfields offshore), these are the nesting grounds for the world’s largest population of Leatherback turtles.

  • Heron and Egret Survey

    Sunday, 18th April 2010

    What a pleasure to be in the open air, ambling gently along the Calamansack road with the blackthorn bushes in full flower and listening to bird song. The sun shone warmly from a cloudless blue sky and a goldfinch popped on to a nearby hedge to greet the 21-strong party with a cheerful tune. Chaffinch and blue tits added to the chorus, a couple of linnets flew over, twittering, and an unseen dunnock gave forth a beautiful melody. As if in contrast, a green woodpecker ‘yaffled’ in the distance. Turning off the road and across pastured fields we had an uncommon view along Polwheveral Creek, with white houses at its head and above them the village of Constantine, dominated by the church, whose bells were ringing out clearly across the valley.