(Andrew Harnik | AP file photo) A fan wears a shark hat as Washington Nationals' Gerardo Parra comes up to bat in the eighth inning of a baseball game against the Cleveland Indians at Nationals Park in Washington on Sept. 29, 2019. Creators of the viral video “Baby Shark,” whose “doo doo doo” song was played at the World Series in October, are developing a version in Navajo.