In a bizarre world where mad scientists insert genes into rodents to make them glow it is unfortunately necessary to add that parenthetical aside in the title. But just a few meters below the waves, marine biologist and explorer-photographer David Gruber discovered something amazing — a surprising new range of sea creatures that glow in many colors in the ocean’s dim blue light.

Join his journey in search of biofluorescent sharks, seahorses, sea turtles and more, and learn how these light-up creatures could illuminate a new understanding of our own brains.