The gulper eel’s adaptations make it a very successful deep-sea predator—its oversized jaws and stomach … Trademarks: The name “Monterey Bay Aquarium Research Institute,” acronym “MBARI,” and its gulper eel logo are trademarks owned by the Monterey Bay Aquarium Research Institute. Permission is granted to use these trademarks in the company’s final product without alteration. Gulper eels are deep-sea fish that live throughout the world’s ocean from a few hundred meters deep to over 2,000 meters (over 6,500 feet) deep in the midwater.