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This male dancing fiddler crab (Uca terpsichores) has built a sand “hood” at the entrance to his burrow, which he hopes will attract females to his humble abode—as if that big beautiful claw of his weren't enough!
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The Dancing Fiddler Crab Shows Off

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Two nautiluses in the open ocean off the coast of Palau.
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A Couple of Nautiluses

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Traditional fishing techniques now involve monofilament nets, with snorkelers diving down to ensure the bigger fish don't get away.
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Fishing with a Net

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A ribbon worm curled up in a mud flat.
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A Ribbon Worm From the Mud Flats

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These zooplankton collected on a research cruise include a jellyfish, a lanternfish, a snipe eel, two large orange shrimp, a fuzzy pyrosome (which is bioluminescent), and several smaller animals.
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Counting the Ocean's Diversity

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Millions of sharks are caught each year for their dorsal fins, which are prized for shark fin soup. Top predators like sharks are important to maintaining biodiversity, and their removal can have ripple effects through an ecosystem.
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Finned Sharks in South Africa

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The Puerto-Princesa Subterranean River National Park site in the Philippines was inscribed on the World Heritage List in 1999. The site's topography varies from flat plains to rolling hinterlands and hills to mountain peaks, encompassing a complete mountai
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Puerto-Princesa Subterranean River National Park, Philippines

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The Banc d'Arguin National Park site in Mauritania was inscribed on the World Heritage List in 1989. Fringing the Atlantic coast, the park comprises sand dunes, coastal swamps, small islands, and shallow coastal waters. A wide variety of migrating birds sp
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<span lang="fr">Banc d'Arguin</span> National Park, Mauritania

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The East Rennell site in the Solomon Islands was inscribed on the World Heritage List in 1998. The site contains one of the largest raised coral atolls in the world, with a marine area extending three nautical miles to sea. The strong climatic effects
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East Rennell, Solomon Islands

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The Peninsula Valdes in Argentina was inscribed on the World Heritage List in 1999. The site is home to important breeding populations of the endangered southern right whale (Eubalaena australis), southern elephant seal (Mirounga leonina), and southern sea
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Península Valdés, Argentina

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The Sundarbans site in Bangladesh, which was inscribed on the World Heritage List in 1997, includes one of the largest remaining areas of mangroves in the world and supports a rich animal community.
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Sundarbans, Bangladesh

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The Macquarie Island site in Australia was inscribed on the World Heritage List in 1997. The island is the exposed crest of the undersea Macquarie oceanic ridge, raised to its present position where the Indo-Australian tectonic plate meets the Pacific p
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Macquarie Island, Australia

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