The world’s most patient mom may be a deep-sea octopus that tends her eggs for nearly 4.5 years. But now, there may be a new contender for her throne.

Scientists have caught a rare glimpse of another deep-sea dweller that may also spend four or more years nursing its eggs, and it does it in an even more unusual place: on hydrothermal vents, where hot water spews from the ocean floor.

It’s called the Pacific white skate (Bathyraja spinosissima), a bone-white, bug-eyed relative of sharks that can live almost two miles (2,900 meters) underwater.

In June of 2015, scientists piloting a remotely operated vehicle through the depths of the Galapagos Marine Reserve discovered mounds upon mounds of Pacific white skate egg-casings