Look at how SHALLOW the tank is. Some seals dive1,500feet below the ocean's surface - but this captive seal could only swim endless circles in a couple feet of water © Joseph Hubbard ©Joseth4048... -1d & Look up the aquarium’s rehabilitation facility. Injured seals are treated. The iso tanks are to prevent injury before release. The "sanctuary of the sea” is likely to kill the seals due to natural selection, which, of course, you’d be fine with given your euthanasia policies.