Who started “Left Shark”?

Snoop Dogg, on X, Feb 2, 2015. It reached 7 platforms in 10.0 years.

LineageContestedKey steps, 10 of 19. Lines follow time and platform
Katy Perry and Bryan GawBefore the first postSnoop DoggFirst postPeakPlatform jumpCommercialOwner responsePlatform jumpBacklashBacklashAfterlifePatient zero