Salamanders and other amphibians glow green when bathed in blue light:
Amphibians fluoresce green to yellow in response to blue (440–460?nm) (Figs. 1 and 2) and ultra-violet excitation light (360–380?nm) (Supplementary Fig. 2), but the biofluorescent light emitted under blue excitation is more intense than when excited by ultra-violet light (Supplementary Fig. 2). Fluorescent green coloration in response to blue excitation light is strikingly widespread across the amphibian radiation (Figs. 1 and 2) and is the focus of this survey. Every amphibian species and life stage we examined, including aquatic larvae, is biofluorescent (Supplementary Table 1). Peak fluorescent emissions coming from these amphibians (Fig. 2) fall within the spectrum of green light (ca. 520–560?nm). The intensities of fluorescent light we recorded were variable among taxa (Figs. 1 and 2) and weakest for those that lacked bright or reflective pigments (i.e., yellows, oranges, whites).
All the amphibians I’m familiar with have a protective mucus layer that protects their skin when out of water.
So the question is, do boogers glow in ultraviolet light? I never thought to check when black light posters were a thing…