Lifeguards spotted about 400 box jellyfish in Waikiki this morning and posted warning signs from Hanauma Bay to Ala Moana Beach Park as the first day of the monthly influx of box jellyfish began, said Bryan Cheplic, spokesman for the city's emergency services department.

"The numbers are bordering on a high influx, which is a little unusual because it's the first day," Cheplic said. "Typically the highest influx occurs on the peak day, which isn't until tomorrow."

The unusually high numbers for Waikiki may be caused by the kona wind conditions, Cheplic said.

However, lifeguards only spotted 10 to 20 box jellyfish at Hanauma Bay and Ala Moana, Cheplic said.

For more information about box jellyfish and treating stings, go to www.hawaiibeachsafety.org or www.808jellyfish.com.