Changing little since it crawled out of the ocean over 350 million years ago, the scorpion still looks like it should be playing in the dinosaurs' back yard. A cousin to the spider, the scorpion is an arthropod, which means it has an external (outside) skeleton, or exoskeleton. This will make all the difference when it comes to shining a light on the matter...
Pale yellow in color and reaching up to 6" in length, the scorpion pictured here eats a dragonfly. The pincers that hold the insect also act like antennae, sensing approaching objects.
Take a blacklight out on a warm, moonless night, and be surprised at how many scorpions you will see. A substance in the exoskeleton causes it to glow blue under ultra-violet light.