Swell sharks produce collagenous egg cases that are tough, lightweight, and selectively permeable. The egg cases have a fiber composite structure that also has nanoscale ordering. Small angle X-ray scattering (SAXS) was performed while tensile testing sections of these egg cases to study the deformation regimes these structures experience at different strains. A MATLAB script was developed to process reduced SAXS results so that the position, magnitude, and area under each diffraction peak could be tracked over the entire tensile test. This requires isolating the peaks so that background scattering can be fitted and subtracted from the data. This information will be used to test the three distinct deformation regimes currently believed to account for the structure’s stress-strain response. The goal of this script will be to quickly analyze a large volume of SAXS data and allow us to reach conclusions about how the nanostructure could develop these three deformation regimes.