Counties with major parks have seen dramatic increases in COVID-19 hospitalizations since early November.
Aquatica San Diego will instead have one final operating season in 2021.
California cities want Gov. Newsom to allow theme parks in the ste to reopen, and the parks themselves are becoming more critical of the governor.
"SeaWorld has determined that it must transition certain park and corporate personnel from a furloughed status to a permanent layoff," the company said in a statement.
Theme parks can't fully reopen in California, but they're finding ways to welcome back guests without rides or attractions.