Figure 1.
(a) Frames of a 7 days post-hatch (dph) fish video prior to strike (above) and immediately before capture (below), that is, the last moment the copepod's location does not overlap with the fish's mouth. Capture happens between this frame and the frame after where the copepod can be seen inside the fish's translucent mouth. Tick marks along the line of attack indicate points of interest: the point between the eyes (fish centre), the jaw's edge and the copepod. (b) Recorded measurements were used to fit basic curves as framework for the model. Black broken curve and the red solid curve are fitted parabolas, assuming that the fish accelerates at a constant 6.3 × 104 mm s−2. Vertical bars at time t = 6 ms indicates the change in location of the fish jaw and copepod during the strike.