Fig. 7. Polar diagrams of drag (C_D) and lift (C_L) coefficients calculated from squid models (with fins) oriented tail-first and arms-first relative to the free-stream flow. The various symbols, which are described in the figure, represent the angles of attack of the mantle. Degree markings within the figures represent angles of attack of the arms. Only mantle/arm angle combinations observed during swimming trials of brief squid are represented. At each mantle angle, the arm angle providing the highest lift-to-drag ratio is denoted in bold type and the ratio is provided in parentheses next to the angle.