A device for recording and monitoring health and physical development of live fish comprises at least one imaging device (3) adapted to image a recording area, a data processor (1), and a memory unit (2), and a guiding device (23, 43, 84) to guide fish through the recording area. The data processor (1) is adapted to analyse images from the imaging device (3), and, identify features of the fish, which characterize health condition and physical development, and store the features in the memory unit (2). This may be performed by imaging fish passing a recording area using at least one imaging device (3), analysing images from the imaging device, and identify features of fish which characterize health condition and individual, using the identified features, create a registry of individuals having passed through the recording area, and store this data in a memory unit (2), and, record the features characterizing health condition in the registry for each individual.
