When it was very low tide last week, I decided to skip the ‘rock pools proper’ on my local beach in Flushing and to check out the zone just below where the rocks and the sandy bottom of Penryn River (an arm of the Fall Estuary) meet. All common rock pool inhabitants – winkles, top shells, edible crabs, worm pipefish and shannies – still live here, but some other organisms are more abundant here than in the rock pools.

Sponges are very common in this silty environment, especially the Estuary sponge Hymeniacidon perleve:

The Breadcrumb sponge Halichondria panicea:

In addition to sponges, I noticed quite a lot of the colony-forming ascidian Botrylloides leachi (see previous post). That explains why I could also find a couple of European cowries Trivia monacha, their predator. Also very common here are the Variegated scallop Chlamys varia and the Thicklipped dog whelk Hinia incrassata (top right picture). I am not sure what the slimy beige stuff is!

I spotted a couple of new things as well, the Red speckled anemone Anthopleura ballii:

Also a first, a Sea spider Nymphon (gracile?):

I found a large patch of these beautiful eggs:

and someone guarding them, a rock goby Gobius paganellus:

A Butterfish Pholis gunnellus:

Very common were little Squat lobsters Galathea squamifera (no picture), rapidly swimming backwards to escape. Even more abundant were these little Hooded prawns Athanas nitescens: