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The siphonophores are an order of marine animals in the phylum Cnidaria (the same phylum containing jellyfish). 
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Siphonophores

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The Sian Ka'an site in Mexico was inscribed on the World Heritage List in 1987. The site's name means "Origin of the Sky" in Mayan and contains tropical forests, mangroves, and marshes, as well as a large marine area intersected by the Caribbean Barrier Re
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Sian Ka'an, Mexico

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The Gough and Inaccessible Islands site in the United Kingdom was inscribed on the World Heritage List in 1995. The site, located in the south Atlantic, is one of the least-disrupted island and marine ecosystems in the cool temperate zone. The spectacular
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Gough and Inaccessible Islands, United Kingdom

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A small giant clam -- yes, that's it's real name -- in Australia's Great Barrier Reef.
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Great Barrier Reef, Australia

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Carrie Bow Cay field station sits in the blue and turquoise waters of Belize.
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Aerial View of Carrie Bow Cay Field Station, Belize

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Mistaken Point New Foundland
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Ediacaran Fossils: One Species at a Time

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Hermit crabs, like this one collected in Moorea, usually protect their soft, vulnerable abdomens from predators by reusing empty snail shells. This specimen shows the crab without its customary borrowed shelter.
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Hermit Crab Without a Shell

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“It’s quite normal for this type of goby to sit still on hard coral like this. I spotted the first of these very small fish and set up my camera for the shot. Just as I was about to take a picture, a second goby came out of nowhere and sat on the first
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Gobies on Coral, Near Marsa Alam, Egypt

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Cartoon t-shirts with got plankton.
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The Cloud Factories that Live in the Sea

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Walruses use sea ice as platforms on which to nurse their young and launch their dives.
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Walrus: An Arctic Mammal in Peril?

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an atoll
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Birth of an Atoll

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