SeaWorld

Her 'Blackfish' changed minds about SeaWorld's orcas. Now Gabriela Cowperthwaite is telling a dog's story

Her 'Blackfish' changed minds about SeaWorld's orcas. Now Gabriela Cowperthwaite is telling a dog's story

Gabriela Cowperthwaite was on the outskirts of Cartagena, Spain, directing her first feature film when she learned that SeaWorld had decided to phase out its killer whale performances. It was November 2015, just over two years after the release of “Blackfish,” her documentary about the plight of orcas in captivity.

Ever since the movie’s debut in 2013, the director had devoted nearly all her time to advocating on behalf of the theme park’s whales. “Blackfish” sparked a public outcry — celebrities urged their fans to boycott the park, government officials proposed legislation banning the breeding of orcas — and Cowperthwaite wanted to capitalize on the momentum.

But she also...

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