Deep Sea dive

SeaWorld, the operator of theme parks featuring performing killer whales, fell as much as 14 percent to $31.80 in extended trading after cutting its forecast for 2013 sales.

Orbitz blitzed

Shares of Orbitz Worldwide tumbled more than 13 percent, to $10.20, after it was disclosed that PAR Capital sold about a third of its investment in the online travel company.

Heinz layoffs

H.J. Heinz, the world’s largest ketchup maker, said it plans to eliminate 600 jobs across North America. The move follows the $28 billion sale of the company to Warren Buffett’s Berkshire Hathaway.

Zyng-out

Zynga said Chief Operations Officer David Ko and Chief People Officer Colleen McCreary are leaving the social-gaming developer amid an executive shuffle. Chief Technology Officer Cadir Lee will also exit.

Discovery sale

Liberty Media chairman John Malone has sold $3.4 million in Discovery Communications stock. Malone sits on the board and continues to own shares in the cable networks company led by CEO David Zaslav.