In a statement released late Monday, SeaWorld said Antorcha has resigned from his positions as CEO and as a member of the company's board. The former chief operating officer of Carnival Cruise Lines was hired by SeaWorld in February.
Marc Swanson, who serves as chief financial officer, has been appointed interim CEO. Elizabeth Castro Gulacsy, who serves as chief accounting officer, has been appointed interim finance chief.
"We thank Gus for his contributions and wish him well in his future endeavors," SeaWorld Chairman Scott Ross said in a statement. "We know Marc and Elizabeth will be excellent leaders in their new roles and will continue to successfully drive the business forward."
Antorcha's departure comes amid a series of management changes at the Orlando-based company, which has endured declining revenue amid a drop-off in visitors following a 2013 documentary called "Blackfish," which outlined abusive animal-aquatic practices and prompted a wave of investigations.
Shares of SeaWorld were down nearly 5%, or $1.48 a share, at $28.62 in early trading on Tuesday. The stock has risen 32% so far this year.