Necklace Shell

A quick post as it has been a while…..Last Sunday we went on a walk on sunny Carne Beach on the Roseland Peninsula. The primary aim was to get some fresh air, the second to find some dahlia anemones to bring home to the aquarium (we succeeded in that) and the third to do a bit of beach combing. Nothing much washed up, but we did find a number of live Necklace Shells (Euspira catena). These gastropods hunt bivalves in and on the sand; if you see shell valves with a neat little hole in them, you know they were victims of this predator. They are name after their necklace-shaped, sandy egg capsules (see here).

This one is about as big as they get. Their cousins in the North-East of the Pacific Ocean (Euspira lewisii) are something else though, take a look at this!

Portuguese Man O’ War

It is that time of the year again: gales, rain and darkness. The only good thing about late autumn/winter to me is that the wind blows interesting things on the beach. Portuguese Men o’ War (Physalia physalis) have been a common sight the last few years (see this post from 2017), perhaps more so than it used to be, but not sure this has been properly investigated. Yesterday we saw several dozen at Loe Bar near Helston, including the smallest specimen I have seen so far. No By-the-Wind-Sailors Vellella and no Violet Snails Janthina, and definitely no Porpita or Glaucus; maybe someday!

Portuguese Man O’ War at Gunwalloe Church Cove and Dollar Cove

The weather today was pretty bad, but it was still very nice to go for a quick stroll on the beach; we chose a new destination: Gunwalloe near Helston. The beach and cliffs here are more reminiscent of some of the North Coast spots, quite barren. At the moment, Facebook and Instagram are overflowing with pretty pictures of washed up Portuguese man o’ wars (or Portuguese men o’ war?) in Cornwall, but we only saw two small shrivelled up ones (at Holywell Beach) so far. It was therefore great to see ten or so on the high tide strand line at Dollar Cove and Gunwalloe Church Cove. The smaller ones measured only five cm or so, with the largest one close to 20 cm (the size refers to the pasty-shaped, gas-filled float or pneumatophore). Unlike true jellyfish, which can move by contracting muscles around their bell, the Portuguese man o’ War (Physalia physalis) just sails. More amazingly, they actually are not individuals but colonies comprised of different, specialized individuals (it is getting late writing this, so I will lazily refer to Wikipedia). Stunning colours and truly great finds!