I wouldn't. Maybe legally, you could fish the tidal zone but in my opinion that goes against the spirit of the law (or the intent, if you like) as the whole point of closure is to protect the species there. Intercepting them enroute to the "no fish zone" doesn't protect the species, and defeats the purpose of the closure in the first place. However, as Nicole points out if the closure is species specific, I don't necessarily see a problem with going after a species that is open in the same system.
For those who want to argue the legality of it, you're right, it's legal. But, it's not ethical and that's the question here.