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

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 ...

Deep-sea creatures often look more like science ... making this one of the best glimpses into an exceptionally rare octopus. Few things are known about the rest of its anatomy.