(26) Botryllus schlosseri (Pallas, 1766)

Status in U.K. – cryptogenic.

Botryllus schlosseri (“star ascidian”) has been recorded at several monitoring programme sites, each year since 2012, from settlement panel, rapid assessment and scrape samples, and has also been recorded from renewable energy structures (Want et al. 2017).

It is considered cryptogenic in Europe (López-Legentil and Legentil 2015).