Fig. 3

3D environments and animal trajectories. a Top down view of the ’single’ dataset result. Red lines and dots show estimated spine poses and head positions of the tracked European eel (C. conger, visualized with one pose per second). The point cloud resulting from the COLMAP reconstruction is shown in the background. b Trajectories of M. surmuletus (orange) and D. vulgaris (purple/blue), and the dense point cloud resulting from the ’mixed’ dataset. Dots highlight three positions per second, lines visualize the trajectories at full temporal resolution (30 Hz) over a duration of seven minutes. b Reconstruction results and trajectories of the ’school’ dataset, visualizing the trajectories of a small school of L. callipterus in Lake Tanganyika. See Additional files 1, 2, 3 for high resolution images