Michele Westmorland / Snorkeler swimming with harmless Jellyfish (Mastigias papua etpisonii), Jellyfish Lake, Rock Islands, Palau, Micronesia.

Alex Hyde / Swarm of Common / Moon Jellyfish (Aurelia aurita)in sea loch, Isle of Mull, Scotland. June.

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Michael Pitts / Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesi

Juergen Freund / Stingless jellyfish float in brackish water lake, Kalaban Is, Kalimantan, Indonesia

Michele Westmorland / Orbiculated Cardinalfish (Sphaeramia orbicularis) just below surface in mangroves, Jellyfish Lake, Rock Islands, Palau, Micronesia.

Michele Westmorland / Snorkeler swimming with harmless Jellyfish (Mastigias papua etpisonii), Jellyfish Lake, Rock Islands, Palau, Micronesia model released

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp), Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group , Jellyfish Lake, Palau

Jeff Rotman / Colony of Anemones (Aiptasia pulchella) feeding on dead Mastigias jellyfish (Mastigias sp.) Palau's Jellyfish Salt Lake, Palau Islands, Micronesia

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp), Jellyfish Lake, Palau

Ingo Arndt / Jellyfish Lake in rainforest, Palau

Ingo Arndt / Jellyfish Lake in rainforest, Palau

Jeff Rotman / Anemone (Actiniaria sp.) eating Mastigias Jellyfish (Mastigias sp.). Palau's Jellyfish Salt Lake, Palau Islands, Micronesia, Pacific Ocean.

Jeff Rotman / Mastigias Jellyfish (Mastigias sp.) swarm. Palau's Jellyfish Salt Lake, Palau Islands, Micronesia, Pacific Ocean.

Michael Pitts / Mass of Jellyfish {Mastigias sp} Jellyfish lake, Palau, pacific island

Michael Pitts / Snorkeller swimming underwater amongst jellyfish {Mastigias sp} Jellyfish Lake, Palau, Pacific ocean island, 2004

Juergen Freund / Upside-down jellyfish {Cassiopeia sp} Kakaban Lake, Kalimantan, Indonesia

Michael Pitts / Jellyfish {Mastigias sp} in jellyfish lake, Palau, Pacific

Juergen Freund / Upside-down jellyfish {Cassiopeia sp} caught by sea anemone, Kakaban Lake, Kalimanta

Norbert Wu / Jellyfish (Mastigias sp) form huge schools that migrate to the sun, have lost their ability to sting, Jellyfish Lake, Palau

Norbert Wu / Jellyfish (Mastigias sp) in polyp stage eats another kind of Jellyfish in landlocked lake, Kakaban Island

Norbert Wu / Papuan Jellyfish (Mastigias papua) has a powerful sting as opposed to their stingless cousins in landlocked Jellyfish Lake, Palau

Norbert Wu / Jellyfish (Mastigias sp) in landlocked Jellyfish Lake have lost their sting, Palau

Norbert Wu / Mangrove (Rhizophora sp) trees line the shore of landlocked Jellyfish Lake, Palau

Norbert Wu / Papuan Jellyfish (Mastigias papua) in rare landlocked lake, Kakaban Island, Borneo

Norbert Wu / Upside-down Jellyfish (Cassiopea xamachana) in rare landlocked lake, Kakaban Island, Borneo

Jeff Rotman / Mastigias jellyfish {Mastigias sp} Jellyfish salt lake, Palau, Micronesia.

Jeff Rotman / Mastigias jellyfish {Mastigias sp} Jellyfish salt lake, Palau, Micronesia.

Juergen Freund / Jellyfish in lake, Palau, Micronesia

Juergen Freund / D - Sea anemone feeding on jellyfish {Cassiopeia sp} Kalaban lake, Borneo, Indonesia

Juergen Freund / Upsidedown jellyfish {Cassiopeia sp} + anemone in brackish water lake, Kalaban Is, Kalimantan, Indonesia. Anemones feed on jellyfish

Roberto Rinaldi / Papua jellyfish (Mastigias papua) in Ongeim'l Tketau / Jellyfish lake, a marine lake in Palau, Micronesia.

Ingo Arndt / Photographer Ingo Arndt with Jellyfish (Mastigias sp) mass, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp), Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Ingo Arndt / Jellyfish (Mastigias sp) group, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Hiroya Minakuchi / Jellyfish (Mastigias sp) group swimming, Jellyfish Lake, Palau

Roberto Rinaldi / Snorkeller with Papua jellyfish (Mastigias papua) in Ongeim'l Tketau / Jellyfish lake, a marine lake in Palau, Micronesia. Model released.

Nature Production / Papuan Jellyfish {Mastigias sp} in Jellyfish Lake, Palau, Micronesia

Nature Production / Papuan Jellyfish {Mastigias sp} at Jerry Fish Lake, Palau

Norbert Wu / Jellyfish (Mastigias sp) form huge schools that migrate to the sun, have lost their ability to sting, Jellyfish Lake, Palau

Norbert Wu / Polyp stage of Jellyfish in rare landlocked lake, Kakaban Island

Michael Pitts / Jellyfish {Mastigias sp} small fish in Jellyfish lake Palau Micronesia

Michael Pitts / Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesi

Michael Pitts / Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesi

Michael Pitts / Divier amongst Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesia

Michael Pitts / Jellyfish {Mastigias sp} in Jellyfish lake Palau Micronesi