Zebrafish are a frequently used model organism for studying development, gene expression and a variety of cell and organ processes. This to-scale computer model of a zebrafish larva can be used as a reference when designing devices to be used for zebrafish studies. Additionally, it can also be used for schematics and graphic illustrations of zebrafish larvae for educational purposes. This particular model represents a larva that is 2-3 days post-fertilization. The solid model is available for download in two file formats: SolidWorks Part file and STL file. (Huemer et al., 2017. Zebrafish).