Researchers believe that they have recorded the first-ever sighting of an adult abyssal anglerfish, also known as ‘black demon fish’ or ‘black seadevil fish’, in broad daylight.

The black seadevil (Melanocetus johnsonii), known for its bioluminescent lure and fearsome appearance, typically inhabits the ocean’s depths, between 650 and 6,500 feet. The fish was filmed by ...