Arachnid

Gain two additional limbs available for use.

Can climb sheer surfaces as though affected by spider climb.

1 natural armor bonus.

Your bite attack deals 1 damage plus injection of poison as per standard poison rules

Can automatically sense the location of anything within 3 x your heritage subtype level that is in contact with the same surface as you are, though movement while affected by Tremorsense causes its bearer to move at half-speed

Can produce strands of sticky webbing, usable as a snare.

Can 'see' everything as sonar pulses for 30ft.

Gain a +2 bonus racial on Craft (alchemy) checks, and you may use poison without risk of poisoning yourself.

Able to perfectly adhere to both natural and artificial vertical inclines as well as ceilings at unimpeded speed, ignoring things such as slipperiness. A Spiderclimb user has also no need make checks to perform advanced movements like balancing

At the start of each of your turns, you regain a number of hit points equal to your heritage subtype level, as long as you have at least 1 hit point.