Fig. 7. Tectal neuropil boundaries dissolve in fuzz wuzzy (fuzz), beyond borders (beyo) and breaking up (brek) mutants. (A-D) Z-projections of confocal image stacks showing lateral views of tecta in 6 dpf live Brn3c:mGFP larvae. The boundary of the tectum is smooth and well defined in wild type (A). In fuzz (B), axon arbors are less dense in the tectal neuropil and often overshoot the tectal boundary (arrowheads). The overshooting phenotype is more severe in beyo (C) and brek (D). Asterisks indicate melanophores. Scale bars: 20 µm.