Box Jellyfish Calendar
Note: This calendar is for informational purposes only. All jellyfish arrival dates are estimates. Jellyfish may be present on any day of the year. Always obey warning signs posted on beaches. Swim on guarded beaches only and ask a lifeguard about the presence of jellyfish and other ocean hazards.
Appearing from 8 to 10 days after the full moon, box jellyfish belong to the invertebrate Phylum Cnidaria, a diverse group of stinging animals whose members all possess nematocyst cells for feeding and protection. Jellyfish relatives include the sea anemones, corals, and Portuguese man-of-war. The box jellies, or Cubomedusae, are named for the squarish shape of their bell-shaped body. Read more…
UH News: Jellyfish Sting Recommendations