Sharks are found in all seas and are common to depths of 2,000 metres (6,600 ft). They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater.
notable works. Pyotr Ilyich Tchaikovsky, Tchaikovsky also spelled Chaikovsky, Chaikovskii, or Tschaikowsky, name in full Anglicized as Peter Ilich Tchaikovsky (born April 25 [May 7, New Style], 1840, Votkinsk, Russiaâdied October 25 [November 6], 1893, St. Petersburg), the most popular Russian composer of all time.
In a greatly expanded article on Tchaikovsky, the British musicologist David Brown flatly states: ''That he committed suicide cannot be doubted, but what precipitated this suicide has not been conclusively established.'' Mr. Brown goes on to say that the composer ''almost certainly died of arsenic poisoning.