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The lake sturgeon, with its sleek shape and rows of bony plates on its sides, looks a bit like an armored torpedo. These freshwater giants have greenish-grey coloring and a pointed snout with two pairs of whiskerlike tactile organs that dangle near its mouth. These organs, called barbels, help it to locate bottom-dwelling prey, such as snails, clams, insect larvae, and fish... nationalgeographic.com