Visitors to seaside resorts have been put on alert after potentially-deadly Portuguese Man o' War jellyfish were washed up on Devon beaches. The creatures were found on beaches at Smuggler's Cove, Dawlish, and Salcombe Regis, near Sidmouth. Marine experts have warned beach lovers not to pick up the jellyfish, which can inflict severe stings from their lengthy tentacles. A seven-year-old boy was recently stung while on Charmouth beach, near Lyme Regis, in Dorset.