All observations:
1)2022-07-21 https://www.inaturalist.org/observations/127255160
2)2022-12-28 https://www.inaturalist.org/observations/145420299
This light-shelled (somewhat fragile) species was previously known as Anodonta grandis ("no tooth"-indicating it's lack of a tooth on it's hinge). Shell smooth, light yellow or yellowish green with rays visible in younger specimens, becoming dark green to brown in older shells and the nacre is white. Length to 10 inches, usually size about 5-6 inches (100 to 150 mm).