[header] How to grill catfish [title] Choose fresh catfish fillets. [step] Look for four to six-ounce fillets that are light in color and firm to the touch. Avoid fillets with dark spots or discolorations. 
Fresh fillets should not have an overly fishy smell. [substeps] You can also buy a whole catfish, in which case you'll want to either ask the fishmonger to fillet it for you or filet it yourself at home before grilling.