(A, B) Light colors depict each bout variable if prey are moving away from the fish while dark colors indicate that prey are moving toward the fish in the same 5° window of space. A pattern emerges of dampening movements when prey velocity is towards the fish, and amplifying movements when prey velocity is away from the fish. Point locations are means with error bars representing 95% CIs. Multiple regression fitting of bout variables to prey position and velocity in all planes confirm and quantify the dampening and amplification (azimuth velocity moving left to right of the fish is positive, altitude velocity upward is positive). Bout Az is biased by .251 * Prey δAz / δt (.219 - .283 95% CI), Bout ΔYaw by .054 * Prey δAz / δt (.046-.061 95% CI), Bout Alt by .300 * Prey δAlt / δt (.268 - .331 95% CI), and Bout ΔPitch by .031 * Prey δAlt / δt (.024 - .039 95% CI). Dividing these coefficients by the average bout length (0.176 s) yields the projected positional coefficients described in the text. (C) Bout Distance is linearly proportional to Prey Distance but only within 4 mm of the fish, with breakdown in relationship above 6 mm. Likewise, dampening of Bout Distance when Prey δDist / δt < 0 (prey approaching radially), and amplifying when Prey δDist / δt > 0 (prey moving afar), occurs in two windows: 0–1 mm, and 1–2 mm from the fish. Overall, multiple regression finds: Bout Distance = 0.105 * Prey Dist + .053 * Prey δDist / δt (95% CIs = 0.094-.116, .034-.071), which reflects the fact that ~70% of pursuit bouts occur when prey are within 2 mm. (*: p<0.05/6, Bonferroni corrected two-tailed t-tests. p-values: 0–1 mm = 2.7 * 10−6, 1–2 mm: 0.0016, 2–3 mm: 0.38, 3–4 mm: 0.73, 4–6 mm: .00046, 6+: 0.92).