To view ... Sturgeon normally live in depths where little light reaches, as you will have noticed they do not react well to sudden movement, so the need for good eye sight is not important. These fish can live for decades. Here are the complete answer How do they harvest caviar? Sturgeons live in temperate waters. They mainly rely on light-dark differences not specific shapes or shades of grey. Beluga Sturgeon / Great Sturgeon ; How to feed your sturgeon. Native to the Caspian Sea, these ancient fish can grow to 15 feet in length, weigh more than a ton and live to be 100 years old. Still larger, the beluga, found in the Caspian and Black seas, measures about 24.6 feet (7.5 m) and can weigh 2,900 pounds (1,315 kg). Since 1998, international trade in all species of sturgeons has been regulated under CITES owing to concerns over the impact of unsustainable harvesting of and illegal trade in sturgeon populations in the wild. Males may reach 55 years, while females have been recorded living for 150 years. While the beluga sturgeon is popular for its fillets, its eggs, known as "true caviar," are regarded as a delicacy. But sturgeon can grow to 11 feet and weigh over 1,000 pounds, so a strike is like being hit by a truck. The female sturgeon who about to lay egg are about to die after the lay their egg anyway. The beluga sturgeon can live more than 100 years, and do not reach maturity until 9 to 20 years of age.
Due to the popularity of their eggs, they're heavily overfished -- typically with gill nets. The new regulations for beluga sturgeon also require other nations to meet U.S. standards for aquaculture, or fish farming, to prevent mixing of species by wild and farmed sturgeon… The nation is fixated on sharks - especially great whites. Lake sturgeon were once abundant throughout the Great Lakes system until overfishing in the 1800s and early 1900s decimated their populations. So whale watching tours on the extreme east end of the Great Lakes may in fact be productive at certain times of the year when whales are migrating. Beluga whales are known to migrate along the Atlantic coast and have been seen in the St. Lawrence Seaway and the Gulf of St. Lawrence.
Conservation. The largest freshwater fish in North America, the white sturgeon, can be 20 feet (6 m) long and weigh about 1,500 pounds (680 kg).