Fig. 8. The influence of momentum and hydrodynamics on coasting performance. Coasts were simulated using the mean parameter values for four ontogenetic stages. Simulations used the momentum, p, of adults (p=1.04x10^-4 kg m s^-1; purple), juveniles (p=8.05x10^-7 kg m s^-1; green), large larvae (p=8.28x10^-8 kg m s^-1; blue) and small larvae (p=7.01x10^-9 kg m s^-1; orange). Model coasting that included (solid line) and excluded (broken line) the added mass is shown. (A-C) Curves show the predicted change in body position as a function of time for coasting simulations in the viscous regime (Eqn 4), with the body lengths of (A) small larvae (L=4.35 mm), (B) large larvae (L=8.19 mm) and (C) juveniles (L=13.81 mm) shown. (D) Simulations of coasting in the inertial regime (Eqn 8) with the wetted surface area of adults (S=660 mm²) were run at each level of momentum.