🕷️ A spider is a small, eight-legged arachnid belonging to the order Araneae, found in nearly every habitat on Earth except extreme polar regions and deep oceans. Unlike insects, spiders have two main body segments—a cephalothorax and abdomen—and lack wings and antennae. They are best known for their ability to spin silk, a strong, flexible protein fiber used to create webs for catching prey, building shelters, or even dispersing through the air in a process called ballooning. Spiders are carni