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.
The exact year the birth of his son Grigori is unknown. It seems to be between 1862 and 1875. His elder sister Maria, who is said to have been an epileptic, drown in a river. His older brother Dmitri fell in a river while the two boys were playing. Grigori jumped in to rescue him and they were both pulled out by a passerby.