Title: Rapid shifts in behavioural traits during a recent fish invasion Authors: Jack A. Brand, Jake M. Martin, Hung Tan, Rachel T. Mason, Jack T. Orford, Michael P. Hammer, David G. Chapple, Bob B. M. Wong. Variable list: ID: Fish identity sex: Fish sex (i.e. male or female) population: Population fish originated from (i.e. domestic or invasive) length: Standard length of the fish (i.e. snout to caudle peduncle) in mm trial: Trial number maze.avg.speed: Average swimming speed (mm/s) of the fish during the maze assay as determined from automated tracking forage.worm.eaten: The number of food items eaten during foraging trials forage.strike.latency: Latency to first strike at a food item during foraging trials aggression.gill.flare: The number of gill flares performed furing aggression trials partner.ID: Identity of opponent during aggression trials trial.order: Order of trial with respect to the most recent water change in experimental arenas (i.e. 1 = immediately after water change, 5 = last fish to be tested in the arena before water change) Notes: A single maze assay of a domestic fish (ID = 64) had to be discarded due to issues with automated tracking.This is coded as 'NA' in the dataset.