cdh15:KRAS(G12D) and rag2:KRAS(G12D) fish developed tumors that displayed an inability to complete muscle differentiation as determined by histological appearance and gene expression analyses.     ///    mylz2:KRAS(G12D) fish showed significantly improved survival compared with cdh15:KRAS(G12D) and rag2:KRAS(G12D) fish. 