Pond Boss Forums FISH & FISHING Fly Fishing & Other Fish Species what kind of shad is this?

Subtropical America. Mostly eastern and central Mexico and also the lower Rio Grande, lower Pecos, and Nueces rivers in Texas (Lee et al. 1980 et seq.; Page and Burr 1991). Historically, found in the Pecos River drainage and lower Rio Grande in New Mexico, but now restricted to the Pecos drainage downstream of Dexter (Sublette et al. 1990).

From reading the USGS page, it looks like it has been found in AZ and OK, possibly by bait bucket stocking (transferred with other bait minnows when collected from the wild). It's a predator unlike GSD and THS.