Soft but firm white blob on sea bed with some sea weeds and some (possibly) Nemertesia antennina
No interactions present.
great range of species in this photo and you are right about the nemertisa. It also looks like there is live maerl in the gravel - the bright pink nodules. I can also see chimney sponge (polymastia penicillus), hornwrack (flustra foliacea), claw moss (crisia), finger bryozoan (alcyonidium diaphanum) and some other bits! very diverse spot
To find out about what's going on in the south west check out http://www.ispot.org.uk/forum/8409
Hello, I had spotted many of the other species you have identified, but I chose to keep the post simple (and I am lazy). Thanks anyway.
It is Maerl. There is quite a lot around the island, especially up the east coast and in Ramsey Bay. I (and others) have been surveying it for Seasearch and the Government.
Lat/Lng: 54.0667, -4.6931
OS grid ref: SC238667