Fig. 4. Kinematic parameters as a function of non-dimensional body velocity in Clione antarctica. (A) Angle of attack () increases with non-dimensional velocity (r²=0.741, F_1,6=17.155, P=0.0061); (B) stroke plane angle during the power phase (ß_ps) increases with non-dimensional velocity (r²=0.725, F_1,6=15.780, P=0.0073); (C) angle of ascent during the power phase (_ps) increases with non-dimensional velocity (r²=0.701, F_1,6=14.099, P=0.0095); (D) kinematic definitions of angle of attack, stroke plane angle during the power phase, and ascent angle.