For the PD study, zebrafish possess high homology and similar functions of genes corresponding with human genetic mutants which cause Parkinson related diseases [20], such as SNCA (zebrafish as SNCB, SNCG1, and SNCG2) [21], Parkin [22], PINK1 [23], DJ-1 [24], and LRRK2 [25]. The gene discussed is SNCA; the disease is Parkinson disease.