The last sighting of the glass octopus was in 2021, and scientists still don't know much about this highly elusive species.

Rare footage captured by scientists in New Zealand in 2023 shows an octopus riding on the back of a shark. In a recently released study, scientists say they still aren’t sure how the deep sea ...

A rare, fanged deep-sea lancetfish washed ashore in Seaside last Wednesday, startling beachgoers. The creepy, cannibalistic ...

Here is a list of eight of the world's rarest animals. This critically endangered porpoise, found only in the Gulf of California, has fewer than 30 individuals remaining, making it the rarest marine ...

Researchers have uncovered four new species of deep-sea octopus in a nursery located near hydrothermal vents off the Pacific coast. This remarkable discovery sheds light on the mysterious lives of ...