This type includes insects, arachnids, other arthropods, worms, and similar invertebrates.
Vermin have the following features.
d8 Hit Die.
Base attack bonus equal to 3/4 total Hit Dice (medium progression).
Good Fortitude saves.
Skill points equal to 2 + Intelligence modifier (minimum 1) per Hit Die. Most vermin, however, are mindless and gain no skill points or feats. Vermin have no class skills.
Traits: Vermin possess the following traits (unless otherwise noted in a creature’s entry).
Mindless: No Intelligence score, and immunity to all mind-affecting effects (charms, compulsions, morale effects, patterns, and phantasms). Mindless creatures have no feats or skills. A vermin-like creature with an Intelligence score is usually either an animal or a magical beast, depending on its other abilities.