Scorpions emit fluorescence…when they are illuminated with ultraviolet light. It is supposed to be a kind of warning. The same happens with centipedes. In biology this phenomenon is called aposematism, that is, warning mechanisms to indicate that they are dangerous.
![biology-scorpion-arthropods-defense-mechanism-aposematism-bioluminiscence-ultraviolet-light](https://i0.wp.com/periergeia.org/wp-content/uploads/2019/09/Imagen1.png?resize=1024%2C762&ssl=1)
There are several types of aposematism, especially in relation to color (intense colors such as red, yellow, blue, black …), but also in relation to sound and chemicals.