low tide

The tides were good this weekend and so we went out to Gylly (Gyllyngvase) Beach in Falmouth, specifically the rocks to the west of the beach (I normally go to Castle Beach to the east):


Although the tide was quite low, no special sublittoral species were encountered, but everything time you go out you still see something new. For instance, a newly moulted Furrowed crab, Xantho incisus pink and soft next to its old brown carapace: IMG_5469

There were very many small Blue-rayed limpets Helcion pellucidum (see also here) on the kelp:IMG_5412

A tiny Rissoa parva snail:IMG_5409

and a Painted top shell Calliostoma zizyphinum:IMG_5457

Some dark green Cladophora rupestris:IMG_5437

A fine red seaweed (I do not know which one) growing on top of Dulse Palmaria palmata growing in turn on top of kelp: IMG_5455

Elysia viridis

A picture from the archive: one day I discovered two beautiful tiny seaslugs on some fine green seaweed (I think Common green branched weed Cladophora rupestris). These Elysia viridis are not uncommon at all but easily overlooked when rock pooling due to their small size. They resemble nudibranch molluscs but they are not related to them. Amazingly, they can keep the chloroplasts from the seaweeds they eat working for some time in their own body, thus harvesting energy from light!