Juergen Freund / Box jellyfish {Chironex sp.} in mangroves, split level, Australia

Doug Perrine / Box jellyfish (Alatina alata) at night in surface waters of deep ocean off Kailua Kona, Hawaii, USA.

Pascal Kobeh / Box jellyfish (Cubozoa) in the open water at night, Palau, Philippine Sea

Fred Bavendam / Southern Sea Wasp (Carybdea rastoni) jellyfish with a small fish it has captured visible within it, Edithburgh, South Australia

Magnus Lundgren / Undescribed Box jellyfish (Cubozoa sp) They are cnidarian invertebrates distinguished by their cube-shaped medusae. Balayan Bay, off Anilao, Batangas, Philippines, Pacific.

Juergen Freund / Box jellyfish (Chironex fleckeri). Far North Queensland, Australia.