Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x Teleconverter; 700 mm; ISO-640; f/11; 1/640 sec. -0.7 exposure bias.
This page is for the Red-eared Slider (Trachemys scripta elegans). These are the most common turtles I see, and I think this specimen is the largest one I have ever seen.