Swordfish caught below surface with longline gear. Exploratory and commercial fishing in the Gulf of Mexico has shown that the fish concentrates in deep water in the fall, winter, and spring off the Mississippi Delta. Profitable catches are being made by U.S. vessels fishing at night.

Image ID: fish7988, NOAA's Historic Fisheries Collection
Location: Louisiana, Gulf of Mexico
Credit: NOAA Central Library Historical Fisheries Collection; P. 118 of "Our Changing Fisheries" 1970 Centenary NMFS centenary volume

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