According to Van Nostrand's Scientific Encyclopedia (2008), a sturgeon's diet primarily consists of crawfish, insect larvae, snails, and various small fish. A sturgeon's fleshy whiskers trail in the sand and assist in finding food, compensating for the fish's poor vision. Sturgeons also have the uncommon anatomical feature of external taste buds that are believed to help them locate food sources as well. Another interesting feeding characteristic of the sturgeon is that it eats quite slowly, a rarity among fish. You might also be interested to know that sturgeons are better known for the human food produced from their eggs (aka roe)--caviar. I hope you found this answer helpful!