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SeaWorld will stop breeding orcas in captivity, the theme park company announced Thursday.

SeaWorld CEO Joel Manby said on "Fox and Friends" this morning that their current population of orcas, also known as killer whales, will be their last, and the animals will be phased out.

"It will take decades to do this, but we will not have any more of them," Manby said.

He added that their famous orca shows will be replaced by an exhibit where visitors can watch the animals in a more natural environment, as opposed to a theatrical performance.

"It will be much more educational, and you'll learn about the plight of the killer whales," Manby said noting that they're also beginning a partnership with the U.S. Humane Society.

He said they're taking these steps because "society has shifted," with more and more people uncomfortable with the large, majestic animals in human captivity.

"I just felt we needed to move forward," Manby said.

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