Spiders really creep me out! It doesn't help there are over 45,700 species and 113 families!
That is very gross. I do not like them either.
Yes, they can breathe air, and have 8 legs. Not to mention they have fangs that inject venom!
I am mostly creeped out by the ones that have little pinchers.
It's strange how no spiders have antennas, like insects do. 
I think all insects are gross. Those little centipedes really freak me out.
Spider
Spiders (order Araneae) are air-breathing arthropods that have eight legs and chelicerae with fangs able to inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every habitat with the exceptions of air and sea colonization. , at least 48,200 spider species, and 120 families have been recorded by taxonomists. However, there has been dissension within the scientific community as
Spider behavior
Spider behavior refers to the range of behaviors and activities performed by spiders. Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms which is reflected in their large diversity of behavior.
Diet.
Almost all known spider species are predators, mostly preying on insects and on other spiders, although a few species also take vertebrates such as frogs, lizards, fish