Very little is known about the gulper eel. This camera-shy deep sea fish is sometimes called the pelican eel because of the strange things it can do with its mouth. Researchers were based out of the Azores Islands where they have been studying underwater species for almost 30 years. They boarded a submarine and plunged 1000 meters below the surface of the water. Then they waited. This is the first time the pelican eel has been seen directly by humans hunting for prey. An early video from an unmanned submarine showed the crazy mouth move, but this video is the first evidence that pelican eels actually pursue their prey, and don’t just hang out in the water waiting for it to fall into their mouths. The scientists hope their footage will help us to better understand the behavior of the pelican eel. And shine some light on how and why it evolved its balloon-like head.