Remarkable footage of a rarely seen giant deep sea jellyfish has been recorded by scientists.
Using a remotely operated vehicle (ROV), they captured a video of the huge Stygiomedusa gigantea.
The jellyfish has a disc shaped bell than can be a metre wide, and has four arms that extend up to six metres in length.
The scientists observed the jellyfish attaching itself to subsea equipment using its large flattened arms
The jellyfish has only been seen 114 times in the 110 years it has been known to science, say researchers.