Describes a p4 or p8 c puffer whose wings are modified as below, so named because of the resemblance to an anchor these additions have during the puffer’s empty and boxy phases. Puffers can be non-anchored, bi-anchored, left-anchored, or right-anchored. Below is a bi-anchored 5-4 robot puffer. For a list of the puffers that can be anchored, see Iteration guides.


x = 9, y = 11, rule = s0/b2