A rare, bioluminescent sea worm has been filmed underwater by divers off the Philippines coast.
Remarkable footage has emerged of the divers swimming with the mysterious creature - called a Pyrosome - which resembles a giant pink, glowing see-through worm.
Diver Ryan Carpenter filmed himself next to the creature - which turned out to be a colony of tiny animals - in the encounter off Ticao Island, 9 News reports.
Mr Carpenter said it was about 1.2m long and 12cm wide.
"Not even the dive master had seen one before, but we later identified it as a colony of tiny animals called tunicates," he said.
The creature is believed to contain ornganelles, which make it give off a bioluminescent glow.