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It is a well-known fact that for animals living in the deep sea, food can be scarce. The food that is around usually rains down from above as dead animals and organic particles from...
A strain of this green seaweed, native to the Indian and Pacific Oceans,...
Both humans and sea lions get sick from eating fish and shellfish that have...
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When snorkeling in the Kahekili Herbivore Fisheries Management Area (KHFMA) in...

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This beautiful bromeliad, also called an air plant because it gets its nutrients and water from the air, is a flowering plant in the pineapple family. All of them are epiphytes, meaning they get their support from and grow on...
Sargassum fluitans , a.k.a. “Gulfweed,” forms dense clumps up to the size of...
Many species of pink coralline algae cover a reef surface in the Southern...

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Around 100 million years ago, grass from land adapted to live and reproduce while submerged in seawater—the modern-day...
Seagrass meadows, such as this one composed of turtle grass ( Thalassia testudinum ) and manatee grass ( Syringodium filiforme ), are an important shallow water habitat. Hundreds of animal species,...
One of the most common inhabitants of the sargassum community, the shrimp Latreutes fucorum (Hippolytidae) is perfectly colored to hide on the leaf-like blades. Off the coast of Belize, Smithsonian...
Often it's the tiniest organisms that do the most harm. One example is microscopic algae, which can grow rapidly to form harmful algal blooms . Such blooms (some are called "red tides") create...
Neptune grass ( Posidonia oceanica ) is an ancient seagrass that is unique to the Mediterranean Sea. It is incredibly slow-growing; so slow that scientists estimate one large meadow that is 9.3 miles...
“Sea grapes” may sound like something Poseidon would snack on, and not a killer algae. Yet Caulerpa racemosa var. cylindracea poses a serious threat to marine life. Spread by the bilge water of boats...
Smithsonian Marine Science Network Postdoctoral Fellow, Seabird McKeon, returns from the Smithsonian field site in Belize. Together with Dan Barshis of Stanford University, Seabird reports on the...
How do plants respond to rising CO2 levels? To find out, plant physiologist Bert Drake at SERC exposed marsh plants near the Chesapeake Bay to CO2 levels expected in 50 and 100 years. Different...
Hardy head silversides ( Atherinomorus lacunosus ) are abundant fish in shallow water seagrass meadows throughout the Indo-Pacific that often form shoals. They feed primarily on zooplankton and small...
Stare at a tide pool and you will often see a crust of pink coating the bottom. No, this is not bubblegum from some careless teenager’s shoe: it’s a stony kind of seaweed that, like other seaweeds,...
Squids, octopuses and cuttlefish, such as this Australian Giant Cuttlefish ( Sepia apama ), compose just one group of animals that call seagrass beds home. Clams and worms bury themselves in the mud...
Sargassum fluitans , a.k.a. “Gulfweed,” forms dense clumps up to the size of a beach ball that slowly rotate as they drift. The fronds are quite dense, but if you look carefully, sometimes you can...
This beautiful marine diatom Chaetoceros debilis was caught in the North Sea. Not only are diatoms one of the most important oxygen producers on earth, they are also a vital link in the food chain...
This beautiful bromeliad, also called an air plant because it gets its nutrients and water from the air, is a flowering plant in the pineapple family. All of them are epiphytes, meaning they get...
An invasive strain of the plant Phragmites australis dominates this Chesapeake Bay wetland. The plant can easily grow up to 3 meters (9.8 feet) tall and alter coastal ecosystems. Scientists at the...
Adult green sea turtles ( Chelonia mydas ) spend most of their time grazing in seagrass meadows. It's estimated that before Columbus arrived in America in 1492, the number of green turtles supported...
A strain of this green seaweed, native to the Indian and Pacific Oceans, escaped public and private aquariums in California, Japan, Australia, and Monaco. It has spread widely in the Mediterranean,...
Even though the Amazon River and the ocean seem very different—the river is freshwater while the ocean is salty, the ocean is vast and deep compared to the Amazon—they are closely connected. The...
Algae has overtaken this coral reef off heavily populated Kiritimati, or Christmas Island. Few fish swim in the murky waters. The causes include pollution, overfishing, and increased water...
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