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The maximum total length may possibly exceed 3 m (9.8 ft) with a maximum weight of over 200 kg (440 lb). [13] Such lengths are rare and unproven during the last century, but there is a somewhat credible report from the 19th century of a wels catfish of this size.
The channel catfish is an important food source in the southern United States and is valued for the quality of its meat. [35] In the United States, catfish is the largest aquaculture industry, and channel catfish make up 90% of farm-raised catfish. In 2021, catfish farmers in the United States made $421 million in sales.
In addition to humans, predators of the gafftopsail catfish include the tiger shark and bull shark. Gafftopsail catfish spawn over inshore mudflats during a relatively short time span (10 days) from May to August; [9]. The eggs are about 1 in (2.5 cm) in diameter. Being mouthbrooders, males keep up to 55 eggs in their mouths until they hatch ...
The North American catfish has acquired an association with American Southern folklore which exceeds its place as a mere food fish. The image of cane-pole fishing for catfish at a proverbial lazy stream has become a stand-by of southern Americana. In some areas, the bullhead is seen as a desirable quarry, for its fighting qualities exceed its size.
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In Africa, this catfish has been reported as being second in size only to the vundu of the Zambesian waters, [4] although FishBase suggests the African sharptooth catfish surpasses that species in both maximum length and weight. [5] [6] C. gariepinus has an average adult length of 1–1.5 m (3 ft 3 in – 4 ft 11 in).
The average 70 kg (150 lb) adult human body contains approximately 7 × 10 27 atoms and contains at least detectable traces of 60 chemical elements. [5] About 29 of these elements are thought to play an active positive role in life and health in humans. [6]