Fig. 1From: A new range-extending record of the invasive sea squirt Styela clava in the north of ScotlandDetail of fouling organisms retrieved from Scapa Flow on 18 December 2020. Fouling was dominated by the solitary tunicate Ascidiella aspersa but included a single individual of the leathery sea squirt Styela clava. This image also features an individual Ciona intestinalis sea squirtBack to article page