Carybdeida is an order of

box jellyfish Box jellyfish (class Cubozoa) are cnidaria Cnidaria () is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in Fresh water, freshwater and Marine habitats, marine environments, predominantly the latt ...

. There are five families within the order. They are distinguished from other box jellyfish by the presence of unbranched muscular bases at the corners of the cubic umbrella. Most species have four tentacles.

References

Cubozoa {{Cubozoa-stub