Watch where you swim — Portuguese Man-of-War are washing up on the beaches in large numbers.

The Department of Parks yesterday issued a warning to the public to take care as the stinging creatures have been gathering in south shore waters in particular.

Bermuda Lifeguard Service has officially opened its lifeguard service to Horseshoe Bay Beach, although other beaches' lifeguard stations will be opened later in the season.

They warn even Portuguese Man-of-War or their tentacles which have washed up on the beach are still capable of stinging for a period of time, so you must watch where you put your feet too.

Lifeguards Superintendent Nathan Trott said in a statement: "We are encouraging members of the public to use our North Shore parks as they currently pose a lower risk for the presence of these marine animals.

"The lifeguards at Horseshoe Bay are actively seeking and removing these marine animals from the beach and bay area in an attempt to reduce the risk of getting stung for our beach patrons."

If stung by a Man-of-War:

• rinse with salt water and remove any visible tentacles from the skin using a glove, towel or stick;

• treat the affected areas with vinegar;

• apply warm water or warm compressor;

• remove any of the remaining tentacles by applying shaving cream with something like a tongue depressor stick or a credit card.

Anyone who starts to lose consciousness or has difficulty with breathing should get immediate medical attention by calling 911.