Arachnid

Spider

 * Black Death
 * Brooding Spider
 * Cave Dweller
 * Cave Skipper
 * Crypt Dweller
 * Crypt Weaver
 * Forest Spider
 * Jungle Skipper
 * Timberscar Spider
 * Dread Arachnid
 * Dread Arachnid Warrior
 * Dread Arachnid Queen
 * Horde Spider
 * Horde Spider Hatchling
 * Horde Spider Broodmother
 * Death Spinner
 * Venom Weaver
 * Spider Hatchling
 * Huge Spider
 * Gargantula

Scorpion

 * Arid Crawler
 * Areneid
 * Desert Crawler
 * Devourer
 * Frostbiter
 * Lashtail
 * Sharptail
 * Sand Stinger
 * Sand Spitter
 * Sea Scorpion
 * Rock Spitter
 * Whiptail

Other

 * Sand Ray
 * Exocite
 * Trilobite
 * Primordite
 * Chitinoid

Bosses

 * Arach, the Spider King
 * Anansi, the Dread Weaver