Find out why this huge shoal between Massachusetts' Cape Cod and Nova Scotia's Cape Sable Island is one of the world's most important fishing resources — and why it's now at risk.

Water bodies on our planet form a network, which aquatic species migrate over evolutionary time as needed or by accident. Find out how Homo sapiens have dramatically changed and accelerated this process.

Meet a deep-sea ecologist at the Monterey Bay Aquarium Research Institute who has pioneered the use of submersible robots to study jellyfish and other gelatinous invertebrates in their native deep-sea environment.

Only in recent years have marine biologists come to grasp the astonishing abundance of gelatinous animals in the world's waters. Discover how that knowledge is helping them better understand how ocean food webs work.

To truly understand the deep sea, scientists need to turn off the lights on their submersible vehicles. Then they can see the ghostly blue flickers of bioluminescence produced by virtually every organism of the deep.

Meet "Big Red," a new species of jellyfish that is bulbous, dusky red, and huge, nearly one meter (about three feet) in diameter, with several fleshy arms instead of tentacles, like a balloon with greedy fingers.

The dozens of diverse lemur species on Madagascar are a motley crew. Still, none look and act quite like the aye-aye. Take a closer look at this lemur, which is considered one of the world's strangest animals altogether.

Learn more about these forests, once generally dismissed as swampy wastelands but now valued as remarkably diverse and important ecosystems.

Investigate this remarkably tough plant that can live in water up to 100 times saltier than most other plants can tolerate, not to mention thrive despite twice-daily flooding by ocean tides.

In a handful of cases, humans have contracted H5N1 from birds and then passed the virus to other humans. Even so, doctors and scientists are taking great pains to prepare for the possibility of such a pandemic.