Example trajectories and frames for the heterogeneous shoals in experiment 2.

<p>The top row (<b>a–c</b>) shows trajectories of three control quadruplets and the second row (<b>d–f</b>) shows trajectories of three quadruplets consisting of three control zebrafish and one zebrafish treated with 5 µM MK-801. In panel (<b>d</b>) the trajectory of the zebrafish treated with MK-801 is presented in blue, in panels (<b>e</b>) and (<b>f</b>) they are presented in green. (<b>g</b>) The MK-801 zebrafish often swims far apart from the three control zebrafish. (<b>h</b>) The control zebrafish are frequently seen to follow the MK-801 zebrafish, (<b>i</b>) which often leads to increased distances between the three control zebrafish. The black arrows points to the MK-801 zebrafish.