Chop catfish into 1/4-inch pieces. Combine catfish, 3/4 cup breadcrumbs, and next 5 ingredients; gently stir until well blended. Shape mixture into 12 patties (about 1/4 cup each). Dredge patties in remaining 1/2 cup breadcrumbs.
Cook patties, in batches, in hot oil in a large nonstick skillet over medium heat 3 to 4 minutes on each side or until golden; drain on paper towels. Garnish, if desired.