A box jellyfish washed ashore at Kuhio Beach in Waikiki. The beaches in Waikiki, particularly near the Kapahulu groin, typically get more box jellyfish than other areas. Richard Ambo • The Honolulu Advertiser   Warning signs will be posted at beaches with box jellyfish sightings. Dozens were found on Waikiki beaches today. Richard Ambo • The Honolulu Advertiser

Warning signs will be posted at beaches with box jellyfish sightings.

The beaches in Waikiki, particularly near the Kapahulu groin, typically get more box jellyfish than other areas. The city's Ocean Safety Division cautions all swimmers from entering the water if they are allergic to stings.

Other near-shore waters that may be affected include Hanauma Bay, Pokai Bay, Makaha Surfing Beach and Waimea Bay.

People stung by box jellyfish are advised to flush the sting area with copious amounts of white vinegar. Anyone experiencing breathing difficulties, muscle cramps or spasms, and/or persistent pain are advised to seek immediate medical attention. Lifeguard stations are equipped to treat this kind of marine sting.

For more information on ocean conditions, advisories and warnings, the Ocean Safety Division provides a prerecorded report 24 hours a day at 922-3888, ext. *51. Or visit http://oceansafety.soest.hawaii.edu.