To be honest I was considering letting him go into the ocean, I am starting to feel a bit guilty about keeping such a smart animal locked in a tank. I didn't realize they were actually fairly smart until I bought him and started reading about him.
DO NOT RELEASE IT IN TO THE WILD!!! Give it back to the store, or find someone that wants it. You can spread foreign organisms by releasing him you could cause and ecological catastrophe. Worse case senario freeze it and donate it for scientific research, but please please please dont release him into the wild.