What is the difference between a spider and a daddy long legs?

Answer 1

Spiders usually have two body-parts while daddy long-legs have only one. Daddy long-legs have a teeny body with very long and thin legs, hence the name. Some spiders might have long legs and small body but you'll never find one as scrawny as the daddy long-legs. You can find daddy long-legs in groups sometimes while spiders are always alone. Spiders defend themselves by biting. Daddy long-legs spit acid and cannot bite, they're fangs are too small to penetrate skin.

Answer 2

The "Daddy Long Legs" spider is actually called a Cellar Spider. Spiders are just any species of Arachnids.