oceans

They've been known to defend other species from killer whales.

Sylke Rohrlach, Wikimedia Commons // CC BY-SA 4.0

It's the second "city" of gloomy octopuses (octopus tetricus) discovered in the area. Maybe they're not so gloomy after all.

These shipwrecks all have intriguing stories, and they’re all places where you can step foot, although in some cases a boat (and possibly scuba gear) may be necessary. Just remember: Look, don’t touch.

Dive into the world of Shark, a new book by award-winning photographer Brian Skerry.

Starting bids range from $10,000 to $15,000.

The behavior is called breaching.

Sunfish are the biggest bony fish in the sea, but this species managed to elude scientists for centuries.

Courtesy of the Chemo III project, BOEM, and NOAA OER

The tubeworms, found in the deepest waters of the Gulf of Mexico, regularly reach 250 to 300 years old.

"It should not be touched."

The Guardian is designed to capture the hordes of lionfish devastating reefs and fish populations in the Atlantic Ocean.

There are now 53 known shipwrecks off the coast of Fourni, Greece.

Those oysters on the half shell you're slurping down could have a second life cleaning waterways and protecting coastal ecosystems.

It's a one-of-a-kind Ice Age relic.

They're a welcome relief from summertime heat. But what causes them in the first place?

Ansgar Walk, Wikimedia Commons // CC BY 2.5

Scientists say climate change in the Arctic has forced the bears to change their eating habits.

Andreas Trepte, Wikimedia Commons // CC BY-SA 2.5

Researchers used Google Earth and radio tags to survey seals at sea and camouflaged against the ice.

The eel babies join wild boars, deer, foxes, lobsters, butterflies, whales, and their own parents in the magneto-orienteering club.

Hans Peters / Anefo, CC0, Wikimedia Commons

French naval officer, explorer, and filmmaker Jacques-Yves Cousteau helped millions of people learn about what goes on under the ocean's surface—but he originally wanted to fly.