Izaak Ziven Sayid Golding Bastian (born 3 January 2001) is a Bahamian swimmer. He competed in the 2020 Summer Olympics. He competes at the collegiate level for Florida State University. At the 2022 Commonwealth Games, held in July and August in Birmingham, England, Bastian served as a flag bearer for the Bahamas at the Opening Ceremony. Two days later, as part of swimming at the 2022 Commonwealth Games, he placed 23rd in the 100 metre breaststroke with a time of 1:04.07. On 1 August, he swam a time of 28.74 seconds in the preliminaries of the 50 metre breaststroke and placed 20th overall.