The turtle they observed is the first known biofluorescent reptile. Biofluorescence is the ability to absorb light and then convert it into stunning colors. This is not to be confused with bioluminescence, which creates light through chemical reactions.
Biofluorescence is predominantly seen in the oceans. Gruber says that this is because "the ocean absorbs almost every other color except for blue ”” so these animals have been creating ways to take in that blue light and transform into other colors."
The lizardfish are hard to spot by day, as their bodies are perfectly camouflaged for the ocean's sandy bottom. At night, however, these guys turn on the lights! Don't get to close, though. They're known for their sharp teeth.