Catfish Comparison and Identification

Channel Catfish

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A: Body with dark spots (spots may be absent in large adults)
B: Outer margin of anal fin rounded, and anal fin with 24 to 29 rays

More about channel catfish

Blue Catfish

blue-catfish-id-diagram.jpg

A: Body without dark spots
B: Outer margin of anal fin straight, and anal fin with 30 to 36 rays

More about blue catfish