Figure 7.

Epischura nordenskioldi attacking an artificial hydrodynamic disturbance. The disturbance resembled that which could be created by a hopping prey item. At 0.021 s, the animal determined the centre of the disturbance and, at 0.042 s, the animal attacked it at full speed, reaching this centre at 0.063 s. The animal then executed a capture motion with its mouthparts. This capture motion left a distinct ‘footprint’ visual at 0.084 s. The animal then continued swimming and at 0.126 s resumed a hunting position with stretched-out antennules. Numbers represent milliseconds, starting when the disturbance became visible. Scale bar, 1 cm.