Fig. 6. Evidence that archer fish do not use an approximate strategy in which they minimize the error é with respect to the prey's position at the end of their turning maneuver. Plot of the error é (see Fig. 1) against the horizontal take-off velocity _hor of the prey, as derived from the same responses as in Fig. 4, in which the times until initiation and completion of the turning maneuver are shown. In contrast to the error e made with respect to the true point of incidence (Fig. 5), the mean of the error é was significantly larger than zero (P<0.01; t-test) at both heights h=20 cm (A) and 40 cm (B).