The sea monsters are back!

The public is being advised to stay well clear of the jellyfish-like Portuguese Man O’War after a number were reported on Cork beaches recently.

Spotted at Garrettstown Beach and Owenahincha, the bizarre-looking creature can be present in the water and on land and is capable of inflicting severe stings.

The dangerous marine invertebrates have appeared on Irish shores every year since 2016 during the months of September and October.

Commonly found in the Atlantic, Indian and Pacific oceans, the animal takes its name from warships used in the 1600s and uses a gas-filled sail to harness wind, allowing it to move across the water.

Some experts believe their sudden appearance on Irish shores is likely due to changing weather patterns and warmer Irish waters.

Swimmers and beach users have been warned not to touch the creatures and that their stingers can remain active long after they die.

Cork County Council has said it will continue to monitor the situation and will fly red flag on beaches where any more of the animals are found.