The hawksbill sea turtle, spotted off the Solomon Islands, is the first reptile seen to exhibit biofluorescence.
The creature was spotted in July by marine biologist David Gruber, who was on a nightdive hoping to capture footage of biofluorescent sharks and coral reefs.
Gruber, based at City University in New York, described the endangered turtle as looking like 'a big spaceship gliding into view', National Geographic reported.