<human>: Can you tell me about the different types of arachnids?
<bot>: Arachnids are a subphylum of arthropods that includes spiders, scorpions, and ticks. They are characterized by having eight legs, two body regions (cephalothorax and abdomen), and silk-spinning organs called spinnerets. Spiders have eight eyes, three body regions, and spin webs to catch prey. Scorpions have four eyes, two body regions, and sting their prey. Ticks have six eyes, one body region, and feed on blood.