Table 4. Velocities, travel times, and asymptote equation coefficients.

Uncertainty reflects bounds of 95% confidence intervals. The asymptotic velocity (in cm/s) is predicted by coefficient “a” of Equation 6. Coefficient “b” governs the slope. The maximum body lengths per second (Max. bl/s) were computed by dividing velocity by the body length of the models (57 cm). The time required to move one body length (t_bl) and half of one body length (t_bl/2) was computed for each model (1: Nautilus-like cruising thrust; 2: Nautilus-like cruising thrust scaled by the higher mantle cavity ratio of Sepia; 3: Nautilus-like peak thrust, coated and uncoated with hydrophobic silicone spray).

Model	a (V asymptote cm/s)	b	Max. bl/s	tbl (s)	tbl/2 (s)
1	49.89 ± 0.72	0.4827 ± 0.0116	0.875 ± 0.013	2.633 ± 0.048	1.755 ± 0.032
2	59.79 ± 0.58	0.6476 ± 0.0111	1.049 ± 0.010	2.101 ± 0.026	1.395 ± 0.018
3 (uncoated)	162.2 ± 3.10	1.490 ± 0.045	2.846 ± 0.054	0.826 ± 0.019	0.552 ± 0.013
3 (coated)	139.2 ± 1.50	1.970 ± 0.040	2.442 ± 0.026	0.815 ± 0.012	0.535 ± 0.008