Of the 52 killer whales in captivity at various marine parks around the world (not including eight recently captured in Russian waters), only 13 were born in the wild. Not even the most fervent whale advocates propose releasing captive-born orcas into the wild (although they would argue for improving their living conditions), but keeping wild orcas in concrete pools, they argue, is simply cruel.
52 whales currently in captivity (possibly 60) only 13 born in wild
