Small longnose gar in particular is not bad at all very flaky and firm with a very mild flavor. Alligator gar is prized in Mexico and is traditional meal served during lent and is popular as "gar balls" in East Texas an Louisiana. However several biologist have told me that like all long lived fish the larger older ones tend to have unacceptably high concentrations of heavy metals like mercury and should not be consumed. Roe of all gar species should never be eaten as its highly toxic. Tilapia and Buffalo can be found live for sale at many grocery stores. Some are definitely eaten, but most are not. Just looks at the photos out there on Facebook and try to find one cube of ice anywhere. The tournaments usually try to find a farmer in need of fertilizer, but the smell is horrendous. In conclusion would be willing to bet a large portion if not the majority are lined up for a photo, a weigh in and then dumped and sometimes buried. However, that could be a good thing on certain lakes and rivers. Such as the Asian Carp in the midwest or the Plecos in the San Marcos. However, we are talking about Ray Roberts here. Would be curious to hear what others have seen there who have been fishing there a long time.