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Giant Squid Filmed Alive for Second Time in History. Here's the Video.

The short film, recorded in the Gulf of Mexico on June 18, shows the giant squid (Architeuthis) approach the faintly blinking lights on a decoy disguised to look like a bioluminescent jellyfish. (These giants are thought to eat smaller squid that feed on certain glowing jellyfish.) At first, the giant squid looks like a swimming slug until its eight legs unfurl, revealing its large suckers that it uses to inspect the device.

The moment the giant squid realizes that the lights aren't a jellyfish, it jets away. [Release the Kraken! Giant Squid Photos]

The fact that this giant squid was alive makes this encounter different from nearly every other time scientists have spotted these behemoths. Typically, the eight-legged creatures are not seen until they are found dead, trapped in deep-sea fishing trawls — the change in pressure and temperature when they are brought to the water's surface kills the animals — or mangled, washed up on shore.

"We're talking about an animal that can get to 14 meters [45 feet] in length," said Nathan Robinson, director of the Cape Eleuthera Institute, who was part of the team that recorded the video. "[The giant squid] has captured the imaginations of countless people, yet we have no idea what it's like, how it behaves or its distribution — where you find it. It remains this mystery. We know it's out there, we just know nothing about it."

Robinson credits the team, as well as the e-jelly with capturing the incredible footage. The e-jelly was developed by Edith Widder, CEO and senior scientist at the Ocean Research & Conservation Association (ORCA). When the deep-sea jellyfish Atolla wyvillei is threatened or attacked by a predator, it lights up like a burglar alarm. The e-jelly, which is part of the entire camera system called the Medusa, mimics this blinking light, with the aim of attracting giant squid.

Eight long elegant legs unfurl as the squid inspects the e-jelly in the Gulf of Mexico. (Image credit: Screengrab of video courtesy of Edie Widder and Nathan Robinson)

Usually, when crewed, deep-sea submersibles or remotely operated vehicles (ROVs) go underwater, they frighten away animals that live in the dim world of deep ocean. That's because these machines tend to be noisy, and shine bright lights on creatures that have never seen the light of day, Robinson said.

ORCA's contraption sidesteps these problems by sending down the Medusa, which is attached to the e-jelly. The Medusa can reach a depth of 1.2 miles (2 kilometers) underwater, where it records footage in ultra-low light with its highly sensitive camera and digital video recorder.

The Medusa and e-jelly combo helped Widder and her colleagues capture the first live footage of a giant squid in Japanese waters in 2012. This time, luck struck again ... and so did lightning.

Terrible weather

On June 19, one day after the footage was recorded, Robinson was reviewing the videos, which were taken deep underwater about 150 miles (240 km) off the Louisiana coast. Then, he saw the image of a weird tentacle stretch across the monitor. The rest of the research vessel's crew quickly gathered round the screen. They were fairly certain it was a giant squid — a juvenile at 10 to 12 feet (3 to 3.7 m) long — but they weren't 100% sure. [Gallery: Jaw-Dropping Images of Life Under the Sea]

The team gathered around the computer to see the giant squid footage. From left to right: Nathan Robinson, Sonke Johnsen, Tracey Sutton, Nick Allen, Edie Widder and Megan McCall. (Image credit: Image courtesy of Danté Fenolio)

Before the team could send the footage to a squid expert, lightning struck the ship.

"This all happened during a lightning storm," Robinson told Live Science. "As we were crowded round watching this footage, we heard a huge crack. We ran outside — there's a plume of black smoke bleeding out from the back of the boat because our antenna had literally exploded. And then we immediately ran back inside because we were like, 'Oh my, what if that just fried all of our computers?'"

One of the computers on board was fried, but thankfully, not Robinson's, which stored the giant squid footage. And if that wasn't enough excitement, about 30 minutes later, a water tornado, known as a water spout, threatened their ship.

The water spout, as seen from research vessel Point Sur. (Image credit: Image courtesy of Joshua Bierbaum)

Finally, the storm ended and their internet connection was restored. The team sent the footage to one of the world's leading squid experts, Michael Vecchione, an invertebrate zoologist at the Smithsonian Institution in Washington, D.C., who confirmed that it was a giant squid.

The footage may be short, but every piece of knowledge scientists can learn about the giant squid — the animal with the largest eyes in the animal kingdom — rests on these rare recordings. The footage was captured just a few miles from the Appomattox deepwater oil rig, meaning that the giant squid's environment might be polluted, the researchers said.

"At present, we know so little about them that there's no way we can protect these animals," Robinson said. The more researchers learn, the better able they'll be to help protect the giants.The expedition, which was organized by Sönke Johnsen, a professor of biology at Duke University in North Carolina, was funded by the Office of Ocean Exploration and Research at the National Oceanic and Atmospheric Administration. You can read more about the adventure in a blog posted by Johnsen and Widder.

Originally published on Live Science.