Why killer whales should not be kept in captivity

Is it finally time to stop keeping orcas in captivity?

For the last few years there has been a torrent of stories of captive orcas suffering severe health problems, and in some cases attacking and even killing their trainers. Many of these stories have focused on an orca called Tilikum, who lives at SeaWorld Orlando in Florida. Tilikum has been involved in three deaths during his time in captivity. SeaWorld has now announced that Tilikum's health appears to be deteriorating, possibly due to a bacterial infection in his lungs.

In response, conservation groups are once again calling for an end to the practice of keeping orcas, and other large marine mammals, in captivity. Are they right?

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