Extraordinary footage of a rarely seen giant deep sea fish has been captured by scientists.
Using a remotely operated vehicle, they caught a rare glimpse of the huge oarfish, perhaps the first sighting of the fish in its natural setting.
The oarfish, which can reach 17m long, has previously only been seen on a few occasions dying at the sea surface, or dead washed ashore.
The scientists also filmed for the first time the behaviour of a manefish.