Appearing between 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 stinging cells for feeding and protection. Jelly/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...