This dataset has been digitised from an article (Wells R (1987) Solent Aliens. Hampshire and Isle of Wight Naturalists Trust Newsletter, April 1987) detailing the potential vectors of introduction of invasive species in the Solent as of 1987, and Carlisle, D. (1954) Styela mammiculata n.sp., a new species of ascidian from the Plymouth area. Journal of the Marine Biological Association of the United Kingdom, 33(2),329-334.