
VAN, TURKEY - MAY 25: Pearl mullets, an only fish species found in Lake Van, are seen as they migrate by moving the opposite direction of the water flow from carbonated and salty water through freshwater during their spawning period from April 15 to July 15, in the eastern province of Van, Turkey on May 25, 2019. ( Özkan Bilgin - Anadolu Agency )

VAN, TURKEY - MAY 25: Pearl mullets, an only fish species found in Lake Van, are seen as they migrate by moving the opposite direction of the water flow from carbonated and salty water through freshwater during their spawning period from April 15 to July 15, in the eastern province of Van, Turkey on May 25, 2019. ( Özkan Bilgin - Anadolu Agency )

VAN, TURKEY - MAY 25: Pearl mullets, an only fish species found in Lake Van, are seen as they migrate by moving the opposite direction of the water flow from carbonated and salty water through freshwater during their spawning period from April 15 to July 15, in the eastern province of Van, Turkey on May 25, 2019. ( Özkan Bilgin - Anadolu Agency )

VAN, TURKEY - MAY 25: Pearl mullets, an only fish species found in Lake Van, are seen as they migrate by moving the opposite direction of the water flow from carbonated and salty water through freshwater during their spawning period from April 15 to July 15, in the eastern province of Van, Turkey on May 25, 2019. ( Özkan Bilgin - Anadolu Agency )

VAN, TURKEY - MAY 25: Pearl mullets, an only fish species found in Lake Van, are seen as they migrate by moving the opposite direction of the water flow from carbonated and salty water through freshwater during their spawning period from April 15 to July 15, in the eastern province of Van, Turkey on May 25, 2019. ( Özkan Bilgin - Anadolu Agency )