Figure 4. (A) Fiber diameter (µm) and (B) total cross-sectional muscle area A (µm²) of fast muscle in Senegalese sole larvae reared at 15°C (blue bars), 18°C (green bars) and 21°C (red bars). Error bars indicate the standard error of the means for each treatment (n = 6) and different letters indicate significant differences between temperatures (p < 0.05).