SeaWorld is still reeling from the effects of the negative media attention it has received over its treatment of captive orca whales.

On Wednesday, the company reported disappointing second-quarter earnings, sending its stock price down more than 30 percent, to end the day at $18.90. The company also cut back its guidance for the remainder of the year, saying it expected revenue to fall 6 to 7 percent.

The drop in stock price is the latest indication of the damage inflicted by the adverse coverage in the news media. SeaWorld came under scrutiny last year after the release of “Blackfish,” a documentary that presents a harsh look at killer whales in captivity. The film transfixed audiences and led to a public outcry over the treatment of the whales, which perform in some of the park operator’s most popular live shows in Orlando, San Antonio and San Diego.

“For people who saw the documentary, a lot of the video was pretty graphic,” said Ian Corydon, an analyst at B. Riley & Company. “More and more, there may be a backlash against the use of sea creatures in these parks.”