Blue catfish
(Ictalurus furcatus)
General data
The blue catfish (Ictalurus furcatus) is the largest species of North American catfish, reaching a length of 165 cm (65 in) and a weight of 68 kg (150 lb). The typical length is about 25–46 in (64–117 cm). The fish can live to 20 years.
The native distribution of blue catfish is primarily in the Mississippi River drainage, including the Missouri, Ohio, Tennessee, and Arkansas Rivers, The Des Moines River in South Central Iowa, and the Rio Grande, and south along the Gulf Coast to Belize and Guatemala.
These large catfish have also been introduced in a number of reservoirs and rivers, notably the Santee Cooper lakes of Lake Marion and Lake Moultrie in South Carolina, the James River in Virginia, Powerton Lake in Pekin, Illinois, and Lake Springfield in Springfield, Illinois. This fish is also found in some lakes in Florida. The fish is considered an invasive pest in some areas, particularly the Chesapeake Bay. Blue catfish can tolerate brackish water, thus can colonize along inland waterways of coastal regions.
Blue catfish are often misidentified as channel catfish. Blue catfish are heavy-bodied, blueish gray in color, and have a dorsal hump. The best way to tell the difference between a channel catfish and a blue catfish is to count the number of rays on the anal fin. A blue catfish has 30–36 rays, whereas a channel catfish has 25–29. Blue catfish also have barbels, a deeply forked tail, and a protruding upper jaw.
