The files contain the positions of the zebrafish in different environments (homogeneous or heterogeneous) for one hour. As indicated by the headers, the first column is the time (in s) while the others are the X and Y coordinates (in m) of the different fish in the tank. There are 10 replicates for each group size (1 or 10) and each environment (homogeneous or heterogeneous) for a total of 40 files.