Remnants of stationary fishing structures on the Northwest Coast of North America are commonly investigated by archaeologists, with most studies focusing on questions of function and chronology. Here it is argued that in Native Northwest Coast ontologies fish and fishing structures were considered animate and part of the social worlds within which humans and fish were engaged. Fish were considered capable of retaliating against those who treated them improperly, and one way of ensuring that no offence would occur was to dismantle fish traps when they were not in use. Using recently documented archaeological fishing structures on Willapa Bay, Washington, USA, as examples, it is argued that these and many other Northwest Coast archaeological fish traps were partially dismantled in the past.