Box Jellyfish

Attracted to these “ocean stingers” by their pink, blue or purple appearance? Well, don’t be. By just one sting, jellyfish can turn any fun trip to the beach into a bummer. Here’s some information that’s good to know.

Jellyfish are common in all waters. The Portuguese man of war is usually noticed by its large float and bright colors. But watch out! Their tentacles may even be as long as 165 feet! Each tentacle can contain millions of cells called nematocysts, which cause the stinging sensation. They eject a barbed thread and sometimes poison. Jellyfish don’t sting you consciously, though. The barbs are released when any object comes in contact with its tentacles. Even dead jellyfish can be a menace to beachgoers. These jelly fish are common at Waimanalo beaches like Bellows
or Waimanalo Bay Beach Park.

The other jelly fish you should be aware of are the Box jellyfish. These jelly fish are seen on our south shore beaches like Waikiki, they tend to visit the beaches 7-10 days after the full moon. The Box Jelly fish are harder to see, they have little color and their float can appear clear.

Jellyfish stings hurt without a doubt. They may be serious but rarely are lethal. Symptoms usually include a burning sensation, redness and welts, and swelling of lymph nodes. In uncommon cases they may induce anaphylactic shock and require hospitalization.

If you are stung by a jellyfish alert the lifeguard on duty. They can help you with any assistance you may need. Brush off any tentacles using an object; do not use your hands, because it may still be able to sting. Spray or pour vinegar over the wound to disable stinging cells. If vinegar is not available rinse the wound with sea water or a saline solution. You can also keep the area iced to minimize discomfort.