Spider legs are a common trait.

Spider mimicry is the ability of a DNA Alternate to undergo a therianthropic transformation and gain the evolutionary traits of a spider. Such traits range from spinning webs, secreting highly lethal venom from fangs, acquiring a hardened carapace, the development of highly sensitive fibers for sensory perception, and the acquisition of additional appendages. In some rare cases, the transformation is only partial, but permanent.

The transgenesis is present from birth, however, the transformations may not begin until early puberty, or may even be delayed until full maturity is reached.