Warning issued as dozens of venomous jellyfish spotted on Cork beaches

Portugese man O'war on Ballycrenane beach in East Cork. Picture: Frances Hegarty

Scientists have issued a warning after several Portuguese man o'war jellyfish - one of the most venomous species in the world - washed up on beaches across Cork yesterday and today.

The jellyfish was once an uncommon sight in Irish waters, however, they have been regularly washing up on beaches on Ireland’s south and southwest coasts in recent years.