Animals with 8 legs mainly refer to arachnids and some crustaceans, as follows:
1. Spiders: Spiders are typically 8-legged animals that use silk to build nests and hunt prey.
2. Crab: Crab is a common crustacean. They have 5 pairs of legs, of which the first two pairs are changed into claws. While not all crabs have eight legs, most crabs have this many legs.
3. Scorpions: Scorpions are also arthropods with 8 legs. They usually live in arid areas and like to hide in caves or under rocks.
4. Centipede: Centipede is an arthropod with a flat body and many legs. Their legs are usually distributed on the sides of the body. The number of centipede legs varies depending on the species, but most have more than 8 pairs of legs.
In addition, there are other deep-sea creatures and insect-like animals that may also have 8 legs.