The term "abyssal ocean" conjures up ominous images, and rightly so — the literal deep sea abyss is extremely dark, at or near freezing temperatures, and full of peril. In the deepest parts of the abyssal ocean, which is defined as the ocean layer between 4,000 to 6,000 meters deep, light is so limited that photosynthesis is not even possible, meaning there are no plants. Because the animals which live there must survive in harsh conditions, they have evolved otherworldly, bizarre adaptations.
The study is "yet another example of the unanticipated ways that our greenhouse gas emissions is affecting global processes."
