A species of stinging jellyfish that swamped salmon cages off Northern Ireland was seen in swarms around the coast of Highlands Scotland.
Mauve stingers have been seen swarming off Sutherland
The Marine Conservation Society is asking the public to report sightings of the mauve stingers in an attempt to gauge its unseasonable blooms.
Billions of the creatures covered an area of up to 10 square miles off the County Antrim coast this week.
The jellyfish have previously been seen off Skye and Eigg.
The MCS said they were also seen off Ullapool and Durness in Sutherland earlier this month.
A guide to jellyfish can be found at http://www.mcsuk.org/.