Social media lights up with pictures of compass jellyfish, but they are relatively common in the summer.
Compass jellyfish are easily identified by the lines that radiate down their body, or bell.
They can grow large, as much as 30cm in diameter, as the picture shows.
A local marine expert has told Island FM that despite lots of pictures recently on social media, the compass is a regular visitor to Guernsey and southern and western British waters.
The marine expert - who didn't want to be named - says despite them being more common this year, it is not unusual, as some years there is an abundance of jellyfish from early on in the season.
They add that the compass has a nasty sting, so they are best viewed from a distance.

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