A compass jellyfish swimming near the surface of clear blue water, it is being partially reflected back from the surface making it seem like the surface is a mirror

Report a jellyfish sighting

Your sightings contribute to marine research and are essential to monitor jellyfish populations around the UK. Jellyfish are important indicators of change in our seas and we use this data to monitor the health of the ocean.
Check our ID guide

Please note, this form is to record jellyfish found around the UK and Ireland only.

We ask that you also provide contact details, either a mobile phone number or an email address so that if any further verification is needed we can contact you. Without this we might be unable to include your sighting in our database.

We’ll use your information for this purpose only. Read our full privacy policy.

Report a jellyfish

Exact location of sighting (if possible, use What3words, or the latitude and longitude co-ordinates using Google Maps)
Estimate the distance in metres
Estimate the distance in metres
If you aren't sure, check out our UK jellyfish identification guide

We'd love to see photos of your sightings. You can share them with us at sightings@mcsuk.org or by tagging us on social media using @mcsuk and #JellyfishSighting. Please include the date and location of the sighting so we can match them to your record.