The wildtype larva is on the left, and a blind zatoichi (s125) mutant is on the right. For
the first 60 s no stimulus is shown, and both fish show spontaneous
eye movements. After 60 s, a clockwise-rotating striped pattern is
projected on the drum around the fish. The wildtype fish responds by
tracking the pattern slowly to the right and making fast reset saccades
to the left. The mutant continues to make undirected spontaneous
eye movements. [Courtesy: Akira Muto]

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