Fish, cloning, fish cloning and a bone to pick

So, let me get this straight, according to the news service, we'll likely be out of seafood in 45 years but the Australian Senate has approved human embryo cloning. Okay, so the obvious question may be why don't we clone the fish? The less obvious question is if, based on the fish situation, we can't manage the environment we have, how do we hope to manage that plus a cloned one? All this isn't to say I'm against stem cell research, which is why Australia is moving in this direction. It just makes me wonder.