California has become the first state to completely ban breeding and holding killer whales in captivity, according to CNN.com.
Gov. Jerry Brown passed the bill on Tuesday and will go into effect in 2017.
With the new bill, killer whales that are already in captivity will remain where they are, but can no longer be used for theatrical shows.
The controversy had been ongoing for years about keeping killer whales captive for entertainment. Sea World, based in San Diego, had ended their breeding program in March and has already started to phase out their theatrical shows.