Figure 4 in Digging with 'hands': observations of food capture in the flying gurnard Dactylopterus volitans (Linnaeusı 1758)

Figure 4. Above: still image collected from video Sequence 1 (0.067 s later than the image shown in Figure 2). White arrow indicates direction of movement of the anterior pectoral fin. At this stage of the movement cycle, the anterior rays have twisted downward against the substratum and are depressed with respect to the posterior rays; the fin is moving downwards, backwards and laterally. Below: line drawing of outline of fish and its fins.