Fig. 4. Muscle strain in the superficial anterior-pointing cones at three points along the body during sprint swimming. Strain is expressed as the percentage length change ±l₀, where l₀ is muscle resting length. Blue, red and green points represent data from 0.35, 0.5 and 0.65FL respectively, where FL is fork length. Values from different fish are shown with different symbols. Data are from six fish, with five measurements from each individual. The solid line is the significant relationship for 0.65FL (see text for further details).