(A) Assessment of the swimming performance using the visual motor response test showed an increase in activity from ctnnd2b+/− 5 dpf larvae compared to wildtype larvae when exposed to darkness (shaded time windows). (B) Quantification of total distance moved per light condition showed that mutant larvae moved significantly move in both light and dark environments. (C) Evaluation of swimming patterns during a dark iteration of the test showed a statistically significant increase preference to swimming in the outer zone of the arena, or thigmotaxis, from the ctnnd2b+/− larvae compared to wildtype controls. **p = 0.0033, ***p = 0.0006, ****p < 0.0001.
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