The gulper eel (Saccopharynx lavenbergi), with its roughly meter-long tail and gigantic mouth, slinks through the water as delicately as a rhythmic gymnast’s ribbon. In this episode of The List ...

The ribbon eel, found in coral reefs, starts black, then bright blue and yellow, and changes sex multiple times throughout its life. The gulper eel, or pelican eel, has a massive mouth ...