"Heart has chosen to decline their forthcoming performance at SeaWorld on 2/9/14 due to the controversial documentary film 'Black Fish,'" the band said Sunday on its verified Twitter account.
Sisters Nancy and Ann Wilson did not elaborate.
But the duo isn't the first to cancel a concert at the Florida theme park because of the film.
"While we're disappointed a small group of misinformed individuals was able to deny fans what would have been great concerts at SeaWorld by Heart, Barenaked Ladies and Willie Nelson, we respect the bands' decisions," SeaWorld spokesman Nick Gollattscheck told CNN on Sunday.
The documentary - which first aired on CNN in October - tells the story of the killing in 2010 of experienced SeaWorld trainer Dawn Brancheau by a 12,000-pound orca.
The film raises questions about the safety and humaneness of keeping killer whales in captivity over the past 39 years.
Moved by the documentary, fans started online petitions asking musicians to stay away.
When the Barenaked Ladies nixed their plans last week to play at SeaWorld, they explained that it was a decision made after viewing "Blackfish."
"This is a complicated issue, and we don't claim to understand all of it, but we don't feel comfortable proceeding with the gig at this time," the band said in a Facebook post.
When SeaWorld's Gollattscheck confirmed Nelson's decision not to sing at SeaWorld, he cited "scheduling conflicts," but Nelson said it was because of the documentary and petition.
"I don't agree with the way they treat their animals," Nelson told CNN's Brooke Baldwin. "It wasn't that hard a deal for me."
SeaWorld said it would like the musical artists to learn for themselves about SeaWorld.
"The bands and artists have a standing invitation to visit any of our parks to see firsthand or to speak to any of our animal experts to learn for themselves how we care for animals and how little truth there is to the allegations made by animal extremist groups opposed to the zoological display of marine mammals," Gollattscheck said.
SeaWorld says the documentary ignores the park's conservation efforts and research.
"'Blackfish' focuses on a handful of incidents over our long history at the exclusion of everything else," wrote Michael Scarpuzzi, vice president for zoological operations at San Diego SeaWorld, in an op-ed on CNN.com. "Not a single interview with a guest who was inspired and enriched by their experience with killer whales at SeaWorld. Not one visitor who left SeaWorld more aware of the need to preserve the world around them. Not one word about the thousands of ill, orphaned and injured animals rescued by SeaWorld or the millions of dollars we dedicate to supporting conservation and research."
In case out of Connecticut that could have dramatic ripple effects regarding legal responsibility, two 17-year-old boys have been arrested for allegedly allowing a friend to drive drunk.
“Seventeen-year-old Jane Modlesky was driving alone in Glastonbury, Connecticut when she crashed the SUV she was driving into a tree in July and was killed,” reports CNN’s Pamela Brown.
“Her blood alcohol level, according to police, was .27, three times the legal adult alcohol limit.”
After a thorough investigation, police arrested two of the four teenagers who were driving with Modelsky– holding them accountable for allowing her to drive drunk, and charging them with reckless endangerment.
Agent James Kennedy of Glastonbury Police says, "These two juveniles knew that she was intoxicated, knew she shouldn't have been driving and allowed her to drive"
“Glastonbury police say the two teens were the last to get out of the car, leaving Modelsky to get behind the wheel and drive herself off. She drove only half a mile before crashing,” Brown reports.
Should a captive chimpanzee have the same rights as a "legal person"?
That's the debate set to unfold after an activist group filed lawsuits on behalf of four chimpanzees, asking the New York Supreme Court to grant them the "right to bodily liberty."
The group wants chimpanzees in captivity to be released based on scientific evidence proving that the animals are very "self aware."
"When we go to court on behalf of the first chimpanzee plaintiffs, we'll be asking judges to recognize, for the first time, that these cognitively complex, autonomous beings have the basic legal right to not be imprisoned," said Steven M. Wise, founder and president of the Nonhuman Rights Project.
According to the group, the four chimpanzees are all held in New York state:
• Tommy, 26, is living in a cage on a trailer lot in Gloversville.
• Kiko, 26, formerly worked in the entertainment industry and is now living in Niagara Falls on private property, where he is caged.
• Hercules and Leo, two young males, are owned by New Iberia Research Center and used in a locomotion research experiment in the Anatomy Department at Stony Brook University in Stony Brook.
"Not long ago, people generally agreed that human slaves could not be legal persons, but were simply the property of their owners," Wise said. "We will assert, based on clear scientific evidence, that it's time to take the next step and recognize that these nonhuman animals cannot continue to be exploited as the property of their human 'owners.' "
Neither the owner of Tommy nor the owner of Kiko has responded to CNN's requests for comment.
But Stony Brook University spokeswoman Lauren Sheprow said the university "has not seen any legal papers related to this matter and therefore is unable to comment."
Pope Francis on Tuesday called for major changes in the Roman Catholic Church - from the top down - saying he knows it will be a messy business but he expects his flock to dive in feet-first.
"I prefer a Church which is bruised, hurting and dirty because it has been out on the streets, rather than a Church which is unhealthy from being confined and from clinging to its own security," the Pope said Tuesday in a major new address.
"I do not want a Church concerned with being at the center and then ends by being caught up in a web of obsessions and procedures."
The Pope's address, called an "apostolic exhortation," is basically a pep talk from the throne of St. Peter. Officially known in Latin as "Evangelii Gaudium," (The Joy of the Gospel) the 85-page document is the first official papal document written entirely by Francis.
“I really appreciate that Pope Francis is saying the Church, too, needs to be converted and that we all need to change. And part of that change is giving women a place of authority, of responsibility, of inclusion in the decisions that are made.”
Father Dave Dwyer, host of SiriusXM's "The Busted Halo Show" comments on the Pope Francis' criticism of clericalism.
“He says, the vast majority of the church are laypeople and we who are clerics are here to serve and so if we get into the mind set of power or authority or nice positions, he said, then the church turns into a museum. The joy of the Gospel is not to be kept from anyone he says.”