Alex Mustard / Planktonic sea walnut ctenophore (Mnemiopsis mccradyi) in open water, Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Ingo Arndt / Ctenophore (Beroe cucumis) showing typical symmetrical combs made of cilia, Weddell Sea, Antarctica

Norbert Wu / Ctenophore (Beroe cucumis) voracious, large mouth, Arctic

Alex Mustard / Ctenophore (Bolinopsis sp.) in a sea loch, with sun. Loch Fyne, Scotland, Great Britain.

Doug Perrine / Comb jelly / sea gooseberry (Hormiphora palmata) diffracting light through cilia (fine hair-like structures) on the comb rows, Kailua Kona, Hawaii, USA.

Doug Perrine / Close-up of Ctenes or Comb plates (Eurhamphaea vexilligera) a translucent gelatinous organism with colors produced by the diffraction of light through cilia. Kailua Kona, Hawaii, USA.

Suzi Eszterhas / Comb Jelly (Leucothea pulchra), native to Pacific Ocean

Jordi Chias / Fin whale (Balaenoptera physalus) with ctenophore in front of its mouth, south Barcelona coast, Spain, Mediterranean Sea

Graham Eaton / Comb jellyfish (Bolinopsis infundibulum) in shallow water and kelp, Bersoch, Cardigan Bay, Wales, UK July

Franco Banfi / Venus girdle comb jelly (Cestum veneris) San Benedicto island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico

Franco Banfi / Comb jelly (Ctenophora) Roca Partida close to San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Comb jelly (Ctenophora) Roca Partida close to San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Alex Mustard / Amphipod travelling on sea gooseberry (Ctenophora) Browning Pass, Vancouver Island, British Columbia, Canada. North East Pacific Ocean.

Pascal Kobeh / Comb jelly (Lobata) in open water, Maldives. Indian Ocean.

Pascal Kobeh / Comb jelly (Lobata) in open water, Maldives. Indian Ocean.

Hiroya Minakuchi / Comb Jelly (Mnemiopsis sp) exhibiting bioluminescence, Japan

Hiroya Minakuchi / Comb Jelly (Mnemiopsis sp) exhibiting bioluminescence, Japan

Pascal Kobeh / Ctenophora / Comb jelly (Beroe mitrata) under the ice, Baffin island, Canada. Arctic ocean.

Alex Mustard / Threadfin butterflyfish (Chaetodon auriga) feeding on ctenophore jellyfish. Sharm El Shiekh, Sinai, Egypt. Gulf of Aqaba, Red Sea.

Solvin Zankl / Amphipod (Amphipoda) riding on comb jelly (Hormiphora cucumis), Gullmarsfjorden, Kattegat, Baltic Sea, Sweden

Michele Westmorland / Ctenophores comb jelly (species unidentified) Galapagos Islands.

Michele Westmorland / Unidentified ctenophores floating in open ocean. Galapagos Islands.

Hiroya Minakuchi / Comb Jelly (Mnemiopsis sp) showing bioluminescence, native to western Atlantic

Juergen Freund / Creeping ctenophore / comb jelly (Coeloplana meteoris) camouflaged on seabed, North Sulawesi, Indonesia.

Hiroya Minakuchi / Comb Jelly (Callianira antarctica) showing bioluminescence, Antarctica

David Shale / Bathypelagic comb jelly (Ctenophora) from benthic boundary layer. Found attached to seafloor by adhesive tentacles. Mid atlantic ridge, June 2010

David Shale / Bathypelagic cyddipid ctenophore / comb jelly (Ctenophora) from benthic boundary layer, mid Atlantic ridge, June 2010

David Shale / Bathypelagic cyddipid ctenophore / comb jelly (Ctenophora) from benthic boundary layer, mid Atlantic ridge, June 2010

David Shale / Bathypelagic comb jelly (Ctenophora) from benthic boundary layer. Found attached to seafloor by adhesive tentacles, Mid atlantic ridge, June 2010

David Shale / Bathypelagic comb jelly (Ctenophora) from benthic boundary layer. Found attached to seafloor by adhesive tentacles. Mid atlantic ridge, June 2010

Richard Herrmann / Comb Jelly (Leucothea pulchra), San Diego, California

Richard Herrmann / Ctenophore (Beroe forskalii), Nine Mile Bank, San Diego, California

Richard Herrmann / Ctenophore (Beroe forskalii), Nine Mile Bank, San Diego, California

Richard Herrmann / Ctenophore (Beroe forskalii), Nine Mile Bank, San Diego, California

Richard Herrmann / Comb Jelly (Leucothea sp), San Diego, California

Richard Herrmann / Comb Jelly (Leucothea sp), San Diego, California

Fred Bavendam / Mottled Creeping Ctenophore (Coeloplana astericola) group on Orange Starfish (Echinaster luzonicus), Bali, Indonesia

Norbert Wu / Ctenophore (Beroe cucumis) a Comb Jelly, Arctic Ocean

Norbert Wu / Ctenophore (Beroe cucumis) a Comb Jelly, Arctic Ocean

GEORGETTE DOUWMA / Red Sea bannerfish (Heniochus intermedius) feeding on a ctenophore (Plankton). Egypt, Red Sea.

GEORGETTE DOUWMA / Red Sea bannerfish (Heniochus intermedius) feeding on a ctenophore (Plankton). Egypt, Red Sea.

Scott Leslie / Sea Gooseberry (Pleurobrachia pileus) comb jelly showing bioluminescence, Nova Scotia, Canada

Scott Leslie / Sea Gooseberry (Pleurobrachia pileus) comb jelly with tentacles extended for feeding, Nova Scotia, Canada

Scott Leslie / Comb Jelly (Mertensia ovum) with tentacles spread to catch prey, Nova Scotia, Canada

Scott Leslie / Comb Jelly (Mertensia ovum) with tentacles spread to catch prey, Nova Scotia, Canada

Scott Leslie / Comb Jelly (Mertensia ovum) with tentacles spread to catch prey, Nova Scotia, Canada

Scott Leslie / Comb Jelly (Mertensia ovum) with tentacles spread to catch prey, Nova Scotia, Canada

Luciano Candisani / Comb Jelly (Beroe sp), Laje De Santos, Brazil

Hiroya Minakuchi / Comb Jelly (Bolinopsis mikado) exhibiting bioluminescence, aquarium, Japan

Hiroya Minakuchi / Comb Jelly (Bolinopsis mikado) exhibiting bioluminescence, aquarium, Japan

Hiroya Minakuchi / Comb Jelly (Bolinopsis mikado) exhibiting bioluminescence, aquarium, Japan

David Shale / Red Cydippid comb jelly {Ctenophora} mesopelagic, Gulf of Maine, Atlantic

David Shale / Red Cydippid comb jelly {Ctenophora} mesopelagic, Gulf of Maine, Atlantic

David Shale / Red Cydippid comb jelly {Ctenophora} mesopelagic, Gulf of Maine, Atlantic

Ingo Arndt / Sea Gooseberry (Pleurobrachia pileus) one centimeter, Helgoland, Germany

Ingo Arndt / Ctenophore (Beroe cucumis) showing typical symmetrical combs made of cilia, Weddell Sea, Antarctica

Ingo Arndt / Comb Jelly (Callianira antarctica) eating Antarctic Krill showing bioluminescent cells, Weddell Sea, Antarctica

Ingo Arndt / Comb Jelly (Callianira antarctica) eating Antarctic Krill, Weddell Sea, Antarctica

Ingo Arndt / Comb Jelly (Callianira antarctica) eating Antarctic Krill, Weddell Sea, Antarctica

Ingo Arndt / Comb Jelly (Callianira antarctica) eating Antarctic Krill, Weddell Sea, Antarctica

Ingo Arndt / Comb Jelly (Callianira antarctica) showing bioluminescent cells, Weddell Sea, Antarctica

Ingo Arndt / Comb Jelly (Callianira antarctica) showing bioluminescent cells, Weddell Sea, Antarctica

Ingo Arndt / Ctenophore (Beroe cucumis) detail showing rows of bioluminescent cilia that make up its combs, Weddell Sea, Antarctica

Ingo Arndt / Ctenophore (Beroe cucumis) showing mouth, Weddell Sea, Antarctica

Ingo Arndt / Ctenophore (Beroe cucumis) detail showing typical symmetrical combs made of cilia and bioluminescent cells, Weddell Sea, Antarctica

David Shale / (Bolinopsis infundibulum) mesopelagic ctenophore / comb jelly, deep sea Atlantic oceandeep sea

David Shale / (Bolinopsis infundibulum) mesopelagic ctenophore / comb jelly, deep sea Atlantic oceandeep sea

David Shale / Comb jelly (Beroe cucumis), deep sea Atlantic ocean

David Shale / Comb jelly (Beroe cucumis), deep sea Atlantic ocean

David Shale / Comb jelly (Pleurobrachia sp), deep sea Atlantic ocean

David Shale / Comb jelly (Beroe cucumis), deep sea Atlantic ocean

David Shale / Comb jelly (Pleurobrachia sp), deep sea Atlantic ocean

David Shale / Comb jelly (Euplokamis sp), deep sea Atlantic ocean

David Shale / Close up of Black-mouth red cydippid ctenophore (comb jelly) W Atlantic.

David Shale / Black-gut red cydippid ctenophore (comb jelly) with extended tentacles, W Atlantic.

David Shale / {Bolinopsis infundibulum} ctenophore (comb jelly) Atlantic. Deep sea species

David Shale / Extended tentacle of Black-gut red cydippid ctenophore (comb jelly) W

David Shale / Black-gut red cydippid ctenophore (comb jelly) with extended tentacles, W Atlantic.

David Shale / Black-mouth red cydippid ctenophore (comb jelly) with extended tentacles, W Atlantic.

David Shale / {Bolinopsis infundibulum} ctenophore (comb jelly) Atlantic. Deep sea species

David Shale / {Bolinopsis infundibulum} ctenophore (comb jelly) Atlantic. Deep sea species

David Shale / Black-gut red cydippid ctenophore (comb jelly) with extended tentacles, W Atlantic.

Hiroya Minakuchi / Comb Jelly (Mnemiopsis sp) exhibiting bioluminescence

Hiroya Minakuchi / Comb Jelly (Mnemiopsis sp) exhibiting bioluminescence

Chris Newbert / Ctenophore (Hormiphora palmata) exhibiting bioluminescence, Hawaii

Flip Nicklin / Comb Jelly (Callianira antarctica) showing bioluminescent cells, Weddell Sea, Antarctica

Norbert Wu / Comb Jelly (Mertensia ovum) feeds on krill; digests it rapidly within transparent gut

Norbert Wu / Comb Jelly (Mertensia ovum) with tentacles withdrawn to lick clean, Arctic

Norbert Wu / Ctenophore (Beroe cucumis) voracious with large mouth, Arctic

Flip Nicklin / Comb Jelly underwater portrait, Arctic

Norbert Wu / Comb Jelly (Mertensia ovum) tentacles splayed to catch prey, Arctic

Norbert Wu / Comb Jelly (Mertensia ovum) feeds on krill which is digested rapidly within transparent gut, Arctic

Norbert Wu / Comb Jelly (Pleurobrachia bachei), Monterey, California

Jeff Rotman / Comb jelly / Ctenophore {Leucothea sp} Brittany, France

Jeff Rotman / Pelagic Comb jelly / ctenophore {Leucathea sp.}, Red Sea

Juergen Freund / Comb Jelly (Ctenophore)