DESCRIZIONE
A method for external fish parasite monitoring in aquaculture, comprising the steps of: - submerging a camera in a sea pen comprising fish; - capturing images of the fish with the camera; and - identifying external fish parasite on the fish by analyzing the captured images, characterized by the steps of: - distinguishing between at least two different classes of external fish parasite which differ in the difficulty of recognizing the external fish parasite; - calculating quality metrics for each captured image, the quality metrics permit-ting to identify the classes of external fish parasite for which the quality of the image is sufficient for lice detection.