The representative images and percentages of kras+ and twist1a+/kras+ zebrafish exhibiting HCA or HCC development were as follows: HCA (2 wpi: 2/8; 1/11, respectively; 4 wpi: 3/8; 1/8, respectively) or HCC (2 wpi: 2/8; 3/11, respectively; 4 wpi: 3/8; 2/8, respectively). This evidence concerns the gene KRAS and hepatocellular carcinoma.