Cruising with a forked versus truncate tail: respirometry and PIV data, and custom software used for kinematics, vorticity, pressure, and force computations.

Matlab scripts: The custom Matlab scripts developed to compute and analyze kinematics, velocimetry, pressure and force data are provided in separate folders that include the master script and secondary functions. Pressure calculations from PIV data use the queen2 Matlab package available at ( http://dabirilab.com/software). Respirometry data: We provide the oxygen consumption data used in statistical analysis of the COT of each specimen for both Mojarras and Pinfish in two separate .xlsx files. In addition to raw oxygen consumption data, each file includes the magnitude of the relative flow speeds in body-length per second tested during steady swimming trials. We also provide the rpm to flow velocity calibration used with our flume as well as the calibration metadata of the optical oxygen probe used in our investigation. Tail aspect ratio: Scaled original pictures of the Mojarras and Pinfish used to calculate the aspect ratio of their corresponding forked and truncate tail are available in .jpg format. PIV data: Velocity fields computed using DaVis are sorted by fish species and specimen. Additional metadata relative to the fish and experimental parameters (i.e., salinity, temperature) are included in separate text files in the ‘Fish metadata’ folder. Videos: High-resolution videos available upon request.