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Kelps are large, brown algae that grow along coasts around the world, especially in cooler regions.
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With Every Breath You Take, Thank the Ocean

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Two baby olive ridley sea turtles.
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Surveying Life On Sea Turtles

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Charles Darwin's first diagram of an evolutionary tree appears in his First Notebook on Transmutation of Species (1837).
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Darwin’s Evolutionary Tree Diagram

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Fossil mosasaur skull and partial skeleton sitting in what looks like the dirt it was excavated from.
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If You Build An Ocean, Sea Monsters Will Come

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An amphipod within Arctic sea ice.
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Amphipod Under Arctic Sea Ice

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This family tree shows how the ancestors of whales moved gradually from land to sea.
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The Whale Family Tree

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Dr. Stephen Cairns, a Smithsonian research zoologist, studies deep-water corals.
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Dr. Stephen Cairns

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Vertebrates evolved in the sea and eventually moved onto land. The ancestors of whales later returned to the sea.
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Whales Returned to the Sea

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A rendering of an underwater marine scene from the Cambrian Period, featuring an arthropod, annelids, and other animals.
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Cambrian Period (542 – 488 Million Years Ago)

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The Galapagos Islands site in Ecuador was inscribed on the World Heritage List in 1978. Located in the equatorial Pacific Ocean nearly 1000 km from South America, the Galapagos Islands and the surrounding marine reserve are a unique "living museum and show
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Sally Lightfood Crab, Galápagos Islands, Ecuador

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An illustration of multispecies communities of dugongs from India, Mexico and Florida
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Multispecies Communities of Seacows

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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 Design of a Beautiful Weapon

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