I agree with the ID. 3.5' is not unheard of to catch from Mississippi. Probably 4' at most, 60 lbs. The fins are in a rough shape - either bitten off or lost to infection/fin rot. May not grow back. Genetic mutation from inbreeding is also possible (inbreeding also leads to albinism). If he is not hungry, it is not normal for him to be so active. Mine swim fast like that only with food in the water. Otherwise, when they swim around, it is leisurely.