Natural history on the North Beach of Hunstanton

It being a glorious day, Mrs T and I assayed to the coastal town of Hunstanton on Saturday, in particular, to the North Beach. (Pictures here at https://picasaweb.google.com/miltoncontact/HunstantonApr11#)
For the first time in several decades of visits to this coast, we walked northwards along Peddars Way, in part to escape the chill wind burning our ears, despite the brilliant sunshine.
The first part of the walk was along the rows of gaily painted beach huts, some in use for the day. Beyond, the route wound its way through the dunes.
Sea Buckthorn grew in profusion on the dunes on either side of the path and many of the plants were decorated with silk nets protecting hatched Brown-tail moth caterpillars. These are increasingly regarded as pests, in particular as the caterpillar's numerous bristles break off easily and can be airborne irritants and allergens.
As is my natural inclination, natural history continued to be a preoccupation on the far more agreeable walk back with the wind behind us. Reaching the sea at the moment of low tide, I collected water and sand to take home for the small aquarium.
For the first time, I saw a live starfish on the sand, Asterias rubens, the common star fish.
Movement at the water's edge revealed an arthropod with the form of a foreshortened centipede, with long antennae, but friendlier in a appearance, to anthropomorphise. I later tentatively identified it as Idotea linearis, an isopod (relative to the wood louse).
There were also small balls of jelly, tinted algal green, scattered here and there along the beach. They could have been a type of jellyfish or a gelatinous egg sac, unfortunately I cannot find further information on them.
Before going home, the older 3m long HBN banner was put to use for a photo-story, enlisting the help of three young ladies on the beach. Back at home, the photos were linked to text in the style of a small childrens's book - you can view the conceit here on issuu.com: http://issuu.com/miltoncontact/docs/ms-banner.