(12) Bugulina simplex (Hincks, 1886)

Status in U.K. – non-native.

Bugulina simplex was found at Kirkwall Marina in 2014 and 2015, and had also been recorded there in 2012 (Nall et al. 2015), but has not been recorded since. It is otherwise known from Shetland (Collin et al. 2015), Peterhead, Somerset and Hartlepool (Bishop et al. 2015b), Northern Ireland (Porter et al. 2017) and Wales (Ryland et al. 2011). Ryland et al. (2011) believed that it was under-recorded in Britain and indicated that its strong seasonality may reduce the likelihood of detection in some months.