Here’s how fish started glowing over 112 million years ago

A comprehensive mapping of biofluorescence across 459 fish species reveals its ancient origins in eels and subsequent independent evolution over 100 times. Coral reefs significantly accelerate this trait's development, with reef-dwelling species acquiring it ten times faster. The research highlights the potential of biofluorescence as a species-specific signaling system and a valuable tool for taxonomic research.

Science