Scores of unsuspecting bathers, some of them young children, have already fallen prey to the small sea creatures's venomous sting.
The weever fish has sharp spines laced with venom along its dorsal fin which stick up out of the sand, where it hides, and inflict agony on any unsuspecting bathers unlucky enough to tread on one.
He said: 'The weever fish uses specially-adapted dorsal fins to inject a fast-acting poison into the wound.'The pain is excruciating and is at its most intense for the first two hours when the affected limb swells up.'There are some basic precautions to avoid getting stung.
The simplest is to wear some form of footwear in the water.'Another way is to shuffle your feet through the sand as you walk - this disturbance should scare away any nearby fish.'Mr Slater said pain from an attack can last for up to 24 hours and those stung by the poisonous fish should treat the area with hot water.
In his youth, he became a senior officer in the colonial militia during the first stages of the French and Indian War.
In 1775, the Second Continental Congress commissioned him as commander-in-chief of the Continental Army in the American Revolution.
In that command, Washington forced the British out of Boston in 1776 but was defeated and nearly captured later that year when he lost New York City.
They are usually invisible to the naked eye as they camouflage themselves under sand in shallow water.
Marine expert Matt Slater, of the Blue Reef Aquarium in Newquay, Cornwall, warned surfers and holidaymakers to be vigilant.