Skip to main content

Watch out for box jellyfish! Stinging beach hazard expected in Pacific waters


play
Show Caption

HAGATNA, Guam – The Department of Agriculture's Division of Aquatic and Wildlife Resources says Guam residents should be cautious — box jellyfish are expected the next few days. 

According to a release, the box jellyfish are expected to be in the waters and beaches along the Mariana Islands from July 25 to July 28. Box jellyfish can sting even if they are washed up on the beach and dead.

The National Weather Service issued a beach hazards statement warning residents of the possibility of box jellyfish. So far no jellyfish have been observed, but beach-goers and swimmers are advised to stay alert and report any sightings to lifeguards, hotel management or authorities.

If you see a jellyfish, avoid contact and stay away.

'Breathtaking': Jellyfish as big as a human spotted by divers

Vacation: America’s 34 richest beach towns

The Division of Aquatic and Wildlife Resources said box jellyfish increase in the area about nine days after the full moon and linger for several days. July tends to be the busiest month for them, the Weather Service stated.

Painful sting

The box jellyfish tend to be several inches large, but their tentacles can extend six to eight feet. The main body of the box jellyfish, the bell, is transparent; four-sided and usually between three and six inches long. They have four tentacles — one on each corner of the bell.

Although box jellyfish on Guam aren't lethal, they still pack a painful sting. Those who've been stung by a jellyfish should treat the area with vinegar and warm water. Others more sensitive reactions to jellyfish stings should seek medical attention.  

People who plan on spending extended amounts of time in the water should wear a full-body wetsuit, the Weather Service stated.