Seagulls hunt pearl mullets, a fish species living in river around Lake Van in Van, Turkey on May 06, 2021. Every year during their spawning season, the pearl mullets live in the Lake Van, have to fight against seagulls feed on migrating fish, while migrating to fresh waters by swimming upstream against the flow stream. (Photo by Necmettin Karaca/Anadolu Agency via Getty Images)
