The momentum behind the AMAZING (and Oscar-shortlisted) documentary film “Blackfish” continues to build. As more and more people watch the film – and learn about all the horrific cruelty involved in forcing intelligent marine animals to perform tricks – SeaWorld has rapidly begun to lose credibility.

And now, CNN reports that three major musical acts – Willie Nelson, Barenaked Ladies, and Heart – have canceled their scheduled performances at the so-called “amusement” park after watching “Blackfish.”

Nelson explained that he made this decision to cancel his performance because, “I don’t agree with the way they treat their animals … what they do at SeaWorld is not OK.” Barenaked Ladies and Heart have also cited the film as a causatory factor behind their decisions.

PETA has reportedly sent these compassionate artists some orca-shaped vegan chocolates to thank them for their decision.

SeaWorld, meanwhile – in keeping with the heroic bravery they displayed over the impending three-month hiatus of their blockbuster show, “One Ocean” – have responded stoically to the artists’ actions. Nick Gollattscheck, spokesman for the organization, has said, “While we’re disappointed a small group of misinformed individuals was able to deny fans what would have been great concerts at SeaWorld … we respect the bands’ decisions.” Doesn’t his courage just move you to tears, Green Monsters?

Gollatscheck and his comrades have also been left red-faced by a strongly worded cease-and-desist letter sent to them by the popular rock musician Joan Jett (who was removed last month from one of Macy’s Thanksgiving Day parade floats because of her animal rights beliefs).

In her letter to Jim Atchison, CEO of SeaWorld, she says:

I was surprised and upset to see on YouTube that SeaWorld used “I Love Rock ‘n Roll” as the opening music for its cruel and abusive “Shamu Rocks” show. I’m among the millions who saw Blackfish and am sickened that my music is blasted without my permission at sound-sensitive marine mammals. These intelligent and feeling creatures communicate by sonar and are driven crazy in the tiny tanks in which they are confined. If I don’t receive written confirmation that SeaWorld will cease and desist from using any Joan Jett & The Blackhearts music, I will be forced to take further action, and you’ll find me among the PETA protesters outside your parks.

Rock on, Joan!

However, other scheduled acts such as Cheap Trick, Justin Moore, REO SpeedWagon, and Scotty McCreery have not yet canceled their SeaWorld performances. Online petitions are currently being run to encourage them to do so (links provided below).

If you, too, want to take a stance against SeaWorld’s cruelty, then sign these petitions and share them far and wide!