1. BBC News (2007). Jellyfish attack destroys salmon. http://news.bbc.co.uk/1/hi/northern_ireland/7106631.stm Accessed 18th November 2019.
2. BBC News (2014). Jellyfish swarm kills 300,000 salmon at Uist fish farm. https://www.bbc.co.uk/news/uk-scotlandhighlands-islands-30493457 Accessed 18th November 2019.
3. Cornelius, P.F.S. (1995a). North-West European Thecate Hydroids and their Medusae. Part 1: Introduction, Laodiceidae to Haleciidae. Synopses of the British Fauna (New Series), No. 50. Field Studies Council, Telford.
4. Cornelius, P.F.S. (1995b). North-West European Thecate Hydroids and their Medusae. Part 2: Sertulariidae to Campanulariidae. Synopses of the British Fauna (New Series), No. 50. Field Studies Council, Telford.
5. Fraser, J.H. (1972). The distribution of Medusae in the Scottish area. Proceedings of the Royal Society of Edinburgh (B), 74, 1-25.