Thus, this model should be a useful tool in future studies to assess the effect of the many genetic manipulations possible in zebrafish (Gore et al., 2018) on the pathogenesis of CCM and to provide a complement to pharmacological screens directed at the dilated heart phenotype of ccm1 or ccm2 mutant fish (Otten et al., 2018). The gene discussed is CCM2; the disease is cerebral cavernous malformation.