Fig. 2. Representative examples of caudal fin shape modulation in a bluegill sunfish, Lepomis macrochirus. Images are frames from posterior-view high-speed video captured during data collection of steady swimming at 1.2 L s^–1 (A), braking (B), and kick (C) and glide (D) maneuvers. Tail outlines closely follow the distal margin of the caudal fin and fin ray position. Arrows indicate the major direction of movement of the dorsal and ventral lobes of the caudal fin. Bar (yellow), 2 cm.