Balanus balanus found at depths of up to and grows on bedrock, boulders, pebbles and shells. It seems to favour habitats with strong currents and when overcrowding occurs, adopts different shapes to fit the space available. It is often found growing alongside another barnacle, "Balanus crenatus". Other species often found in its vicinity include "Tubularia larynx", "Obelia geniculata", "Pomatoceros triqueter", "Pecten maximus", "Hydroides norvegica", "Chlamys opercularis" and "Sertularia" species. Coralline algae was often present as were the whelk, the European edible sea urchin ("Echinus esculentus"), the great spider crab ("Hyas araneus") and the shore crab ("Carcinus maenas"). The main predator is the
Garden sharing over 40,000 members. Although this is a number that have registered since 2009 when the social enterprise was first publicized widely, since then its activity has decreased. Scotland, has only one project, a charity called Edinburgh Garden Partners which has over 60 gardens throughout the city shared by volunteers. The charity aims to promote locally grown food and the skills of doing so with supporting older and disabled people who can no longer manage their garden. In France, Prêter son jardin ("Garden lending") is a garden sharing web site started by a journalist in 2010. Garden sharing projects are also