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A beroid ctenophore lunges toward prey with its mouth wide open.
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Mouth Agape Comb Jelly

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Up close look at thin tentacles of a jellyfish.
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Jellyfish Tentacles Close Up

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Comb jellies (such as this Bolinopsis species) are named for their combs: the rows of cilia lining their bodies that propel them through the ocean.
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Ctenophore Combs - Close Up

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A translucent arctic comb jelly.
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Arctic Comb Jelly

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This rare staurozoan, or stalked jellyfish, Haliclystus californiensis, is about 2 centimeters in length and was collected off the coast of California.
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Staurozoan: The Stalked Jellyfish

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A bamboo shark grows in a thick egg case. Even within the egg case, the embryonic sharks can sense predators nearby and, in response, stop all gill movement and hold still to slip under the radar.
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Shark Embryo

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An illustration of a deep-sea dragonfish.
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Deep-Sea Dragonfish

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This bait ball shows how small fish can react when larger predators are near, gathering tightly together in a ball-like formation that exposes the least number of fish.
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Bait Ball

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Lindsay Aylesworth is a PADI dive instructor, marine biology consultant and PhD student with Project Seahorse at the University of British Columbia. Lindsay has carried out monitoring and survey work in the tropical marine environment for ten years, starti
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Lindsay Aylesworth

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Flame shells live in enormous colonies, but hidden in nests.
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Orange-Tentacled Flame Shell

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A stingray swims in an Australian marine reserve.
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Australia's 1.2 Million Mile Marine Reserve

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Colorful Christmas tree worms
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A Forest of Christmas Tree Worms

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