This brightly colored fish accurately called the “Rainbow Fish”, can be found in the Mediterranean Sea and in the North Atlantic Ocean from Sweden to Senegal. It feeds on smaller prey such as shrimp and even sea urchins. This fish is a Sequential Hermaphrodite, which means that it can change sex at some point in its life. These fish are typically found near the shore in places with seagrass or rocks.
It almost looks like it would glow even more under a black light.