>> Turning a killer whale loose is the equivilent of killing it due to the nature of wild killers whales in relation to their social structure.

I agree that this is a tough one....OTOH, the captive whale Keiko was released semi-successfully some years ago.
-----
----

0.1 Peruvian rainbow boa (Amaru)
2.0 Brazilian rainbow boas (Arco, Olho)
0.3 Honduran milksnakes (Chicchan, Chanir, Hari)
1.0 Thayeri kingsnake (Coatl)
2.7 corns (Cetto, Tolosa, Uce, TBA)
1,000,000.1,000,000 other critters