This dataset covers the status of the commercial lobster (Homarus americanus) fishery. Commercial lobster fishing activities within the administrative boundaries of Forillon National Park inevitably have impacts on this invertebrate population. Through annual stock status monitoring, it is possible to study the impacts of the fishery and changes in the lobster population in the coastal waters of the park. Data are gathered by means of at-sea sampling, whereby a monitoring team boards lobster vessels to collect data at sea during three periods of the fishing season. The monitoring provides information on harvesting effort, lobster size, sex, reproductive status and harvested biomass.