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Fig. 3 Mitochondrial network analysis for the caudal fin cells from adult fish of the wild-type, ict1−/−, and mtrfr−/−. Skeletonized images shown in Fig. 2 were analyzed using the mina software to show mina descriptors: number of individuals (A), number of networks (B), mitochondrial footprint (C), mean branches per network (D), and mean rod/branch lengths (E). Violin plots are shown for the four descriptors of wt (n = 22), ict1−/− (25) and mtrfr−/− (29). The violin plot outlines illustrate kernel probability density; in other words, the width of the violin plot represents the proportion of the data, thus demonstrating data distribution. The third quartile, the median, and the first quartile are indicated by horizontal bars from top to bottom, while the average is indicated by a circle. Asterisks indicate significant differences between individual groups (indicated by bars). Kruskal–Wallis test with Dunn's multiple comparisons test, ****P < 0.0001; ***P < 0.001; **P < 0.01; *P < 0.05.