Various marine plants, generically referred to as kelp, are a dominant species in the shallows on rock surfaces all around the UK. The size of individual plants and depth at which they are found, vary with their location, dependant on light levels and other factors. In the northern North Sea for example, kelp is not found much below a depth of 8m whereas in clear Atlantic water out at St. Kilda, it occurs down below 25m. The Ballan Wrasse seen here is a conspicuous fish of the kelp forest.
North Sea. St. Abbs Marine Reserve