Arachnids are a type of arthropod, which are a type of animal. :)

The taxonomic hierarchy of this particular spider is:

Kingdom: Animalia
- Phylum: Arthropoda
-- Class: Arachnida
--- Order: Araneae
---- Family: Agelenidae
----- Genus: Agelenopsis
------ Species: Agelenopsis spp.

Animalia > Arthropoda > Arachnida. ;)

Awww. Nope, this is a harmless and helpful little Agelenopsis type. Commonly called a grass spider. They typically live in little funnel webs.