All spiders have fangs, but most are very small and not harmful to humans. Most spiders are unable to pierce human skin with their fangs, but the majority that are strong enough are also venomous.
Most spiders do not have any teeth besides their fangs, making them unable to chew their food. Instead, they use venom to liquefy their meal and suck it up. All spiders are carnivorous, and most eat insects, but some of the larger species also eat small animals, such mice and birds. Many catch their prey by spinning webs, but there are also spiders that actively hunt and ambush unsuspecting prey.