Fig. 2. Slow and fast straight swimming of zebrafish larvae demonstrating the distinct swimming gaits during straight swimming. (A) Average velocity across one locomotor cycle, (B) distance traveled in a locomotor cycle, (C) duration of a locomotor cycle, (D) Reynolds (Re) number. All comparisons are significantly different (P<0.0001). All values are given as mean of three trials for each of 10 individuals for slow (N=30) and five individuals for fast swimming (N=15). All data consist of one analyzed tail beat from a longer swimming event. Fish effects were present in two individuals and were not correlated to length.