👉 Arachnomur, also known as arachnids, is a group of invertebrate animals that includes some of the most diverse and complex groups of organisms on Earth. They are characterized by their unique body structure, with arms or legs, which they use to move, climb, and navigate through their environment. Arachnids are often referred to as spiders because of their segmented bodies, with eight segments (legs) that serve different functions.