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Giant lion’s mane jellyfish stings after Pembrokeshire sighting

By Drooid · Sep 15, 2026, 10:44 AM UTC · How we work

Summary

Story summary

Swimmer Morgan spotted a giant lion's mane jellyfish near Trefin Beach in Pembrokeshire.
The jellyfish’s tentacles measured 30 to 36.5 metres, longer than a bus or small train.
Marine biologist Dr Cathy Lucas said the video captured the animal’s extraordinary length.
Lucas warned that broken tentacle pieces still sting, delivering the worst sting recorded in the UK.

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Story summary

Swimmer Morgan spotted a giant lion's mane jellyfish near Trefin Beach in Pembrokeshire.
The jellyfish’s tentacles measured 30 to 36.5 metres, longer than a bus or small train.
Marine biologist Dr Cathy Lucas said the video captured the animal’s extraordinary length.
Lucas warned that broken tentacle pieces still sting, delivering the worst sting recorded in the UK.