Doug Perrine / Bioluminescence from glowing plankton in sea tide line on beach, with stars above and ship lights on horizon, Vaadhoo Island, Raa Atoll, Maldives, Indian Ocean, October 2010

Gary Bell/ Oceanwide / Sea Goldie (Pseudanthias squamipinnis) school in coral reef with feather stars, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Starfish (Uniophora granifera) on seagrass, Yorke Peninsula, South Australia, Australia

Gary Bell/ Oceanwide / Candy Cane Sea Star (Fromia monilis), Anilao, Philippines

David Fleetham / Close up of underside of Panamic cushion star (Pentaceraster cumungi), Galapagos Islands, Ecuador.

David Fleetham / Necklace sea star (Fromia monilis) on gorgonian coral, Indonesia.

Alex Mustard / California sea lion (Zalophus californianus) uses a Panamic cushion star (Pentaceraster cumingi) as a toy. The sealions pick up the starfish and then drop them and chase after them as they sink. Los I...

Alex Mustard / Portrait of a Nudibranch (Flabellina pellucida) on a kelp frond with star trails. Gulen, Norway. North East Atlantic Ocean.

Georgette Douwma / Chocolate chip sea star o (Protoreaster nodosus) on sandy bottom. Mabul, Malaysia.

Franco Banfi / Sea star (Hacelia attenuata) on coral covered with mucilage, a symptom of rising sea temperature, Vis Island, Croatia, Adriatic Sea, Mediterranean.

Solvin Zankl / Deepsea Basket star (Gorgonocephalus lamarckii) specimen, from the North Atlantic near Iceland.

Sean Crane / Bat Star (Asterina miniata) trio at low tide, Montana De Oro State Park, Los Osos, California