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Hawaiian monk seals are among the wildlife found within the Papahānaumokuākea World Heritage Site.
slideshow

Backbone of Biodiversity at Risk

The International Union for the Conservation of Nature (IUCN) maintains the...
Thu, 10/28/2010 - 19:01
Photograph of the underside of a gelatinous octopus with a bright yellow bioluminescent ring around her mouth.
slideshow

Bioluminescent Animals Photo Gallery

Bioluminescence is one of the more captivating adaptations that have evolved in...
Thu, 08/18/2011 - 16:24
Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
slideshow

Bizarre and Beautiful Coral Reef Animals

From parrotfish that cover themselves in a blanket of their own mucus to tiny pygmy...
Fri, 12/04/2009 - 14:05
This aptly named fish has two long fangs.
slideshow

Creepy Critters: Marine Life Surfaces for Halloween

Claws, spines, spikes, tentacles, and fangs. Aliens, monsters, and ghostly...
Wed, 10/27/2010 - 13:56
This new species of lobster (Dinochelus ausubeli) is blind and has bizarre claws. It was discovered about 300 meters (984 feet) deep in the Philippine Sea by a Census of Marine Life expedition.
slideshow

Deep Ocean Diversity Slideshow

Deep sea animals have to live in a very cold, dark, and high-pressure environment...
Tue, 12/08/2009 - 15:08
A reddish-orange nudibranch.
slideshow

A Collage of Nudibranch Colors

Nudibranchs are a kind of sea slug, and their 3000 species are found from the poles...
Wed, 01/22/2014 - 12:51
Hawaiian monk seals are among the wildlife found within the Papahānaumokuākea World Heritage Site.
slideshow

Endangered Ocean Animals

The Endangered Species Act (ESA) was signed into law on December 28, 1973 by...
Mon, 12/02/2013 - 14:00
Small red hyperiid.
slideshow

The Hyper Eyes of Hyperiids: How Some Shrimp-Like Creatures See Light in the Deep Sea

Hyperiid amphipods are small crustaceans related to sand fleas and distantly...
Tue, 08/19/2014 - 10:47
Mangrove roots provide an underwater habitat for many marine species.
slideshow

Mangroves: Photos of Plants and Animals

Mangrove is the name for a tree—and also for a complex ecosystem—that bridges...
Mon, 09/29/2014 - 11:48
This shrimp is colored to fit in - probably why they are common members of the seaweed community.
slideshow

A World Adrift: Life in the Sargassum Slideshow

Smithsonian Marine Science Network Postdoctoral Fellow, Seabird McKeon, returns...
Fri, 05/18/2012 - 16:43
A tiny yellow goby living inside an abandoned can on the seafloor; Suruga Bay, Japan
slideshow

Image Gallery: The Perfect Underwater Photo

For nearly 35 years, National Geographic photojournalist Brian Skerry has been...
Mon, 12/19/2011 - 16:13
Census researchers discovered this sea cucumber (Enypniastes sp.) in the Gulf of Mexico.
slideshow

Zooplankton Biodiversity

Holozooplankton are animals that live adrift in the ocean waves for their entire...
Wed, 08/29/2012 - 12:19
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