Monterey Bay Aquarium Research Institute scientists have discovered Bathydevius caudactylus, a new species of glowing sea slug that lives deep in the ocean.

The extreme depth of the midnight zone has posed a challenge for scientists seeking to understand the unique animals that ...

The marine photographer who captured the footage said it could be the world's first recorded sighting of a black seadevil ...

The animals typically haunt an area known as the midnight zone or the bathypelagic zone at depths of over 3,300 feet. The sheer darkness in that zone earns it the “midnight” nickname.

Beyond this limit lies the twilight zone, where light begins to fade, and further still, the midnight zone ... Researchers observed various animal behaviors, including a particularly interesting ...