UK Freshwater Jellyfish Recording Scheme

The UK Freshwater Jellyfish Recording Scheme is designed to collect observations of freshwater jellyfish across the United Kingdom. The most well-known freshwater jellyfish, Craspedacusta sowerbii, was first described in London in 1880, but there have been few reports of this elusive species since. It has a global distribution and is likely to have more widespread distribution in the UK than is currently known. You can help by letting us know when and where you see them:

• When you saw them (date and time) - even if you saw them in previous years!
• Where you saw the freshwater jellyfish (location and/or geographical coordinates).
• How many freshwater jellyfish did you see? (1, <10, 10-100, 100-500, 500-1000, more than 1000)

We’d be very grateful if you could also provide a photograph or a video of your sighting! Records can be added to iRecord or sent direct to the scheme.

If you are comfortable catching freshwater jellyfish, please put a couple in a jar and contact us soon.

The main identification resource is:

• Bouillon, J., & Boero, F. (2000). Synopsis of the families and genera of the hydromedusae of the world, with a list of the worldwide species. Thalassia Salentina, 24, 250. doi.org/10.1285/i15910725v24p47