MITF and neoplasm: We have previously reported on a transgenic zebrafish line—Tg(mitfa:V12HRAS; mitfa:GFP)— expressing oncogenic HRASG12V in their melanocytes (herein named V12RAS fish) that present with radial growth phase (RGP) melanoma and occasionally develop raised tumour nodules, accompanied by more invasive growth, which we equate to vertical growth phase (VGP) melanoma [2].