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Figure 4
(A) Four recirculating flow zones were generated surrounding the zebrafish. It is demonstrated that there are two balanced positions, i.e., position-1 denotes the inward flow and position-2 denotes the outward flow. (B) Position distribution of different types of zebrafish shows that high-mobility fishes can be easily distinguished from the low-mobility group, i.e., type I (purple), type II (red), and type III (green) zebrafish. Each line reflects the average angle of individual zebrafish over a time span of 5 min. (C) Traces of single zebrafish's movement indicate that different types of zebrafish can be distinguished from each other. Each dot represents the position angle of a zebrafish at different time points. The scale bar denotes 1 mm.