Arthropods are a large group of animals, including hexapods (insects, etc.), crustaceans (shrimps, crabs, etc.), chelicerates (spiders, scorpions, etc.), and myriapods (centipedes, millipedes, etc.) Exoskeletons and other animals form a taxonomic unit called Arthropoda (scientific name: Arthropoda). Including the well-known shrimps, crabs, mosquitoes, flies, butterflies, spiders, centipedes and extinct trilobites. There are approximately 1.2 million existing species in the world, accounting for