First: I have to apologise for the previous blog – not one single mention of our wonderful Welsh name, Ynys Echni.
Whatever you call us, Flat Holm, Ynys Echni, or Bradan Relice, we do still have a few little secrets. One of those is only really visible at low tide. Today we had a low tide, a really low tide!
A small polychaete worm, known as Sabellaria alveolata. It is one of two species of Sabellaria worm that are present in the UK. The second is known as Sabellaria spinulosa….or the Ross worm. Now, maybe i’m being a little childish, but Ross (our wonderful education warden), already has a gull named after him, and now a rare polychaete worm. I feel a little left out! Anyhow, our worm, Sabellaria alveolata fortunately has a common name; the honeycomb worm. It builds ‘biogenic reef’s’ , that is a reef built from small particles by a living organism. Basically, this little worm builds a little tubular house for itself out of sand, bits of old shell, anything it can find really – have a look at some of the photos below… Worms die off, new worms stand on their shoulders and build new homes….