Alternate Form

Alternate Form (Su): An aranea's natural form is that of a large monstrous spider. It can assume two other forms. The first is a Medium-size humanoid (the exact form is fixed at birth). The second form is a Medium-size, spider-humanoid hybrid. Changing form is a standard action.

The aranea keeps its ability scores and can cast spells, but cannot use webs or poison in humanoid form.

In hybrid form, an aranea looks like a humanoid at first glance, but a closer inspection will reveal its fangs & spinneretes. The aranea can use weapons & webs in this form.