Yes, HR 669 does come to mind, however I think in a way it is bad, and I see where you're coming from, but in terms of different species. In almost all reef tanks, people end up mixing fish from completely different parts of the world that otherwise would never see each other. Also, I'd say a very large amount of fish deaths due to noob mistakes are that people see a "nemo" or a "dory" and HAVE to have it for their goldfish tanks and don't realize that, no, they can't be kept together and nemo will die. (as cute as that movie was, it's done a number on the fish in this hobby). I don't know, but I personally don't have a problem with it. There's plenty of other reason's that they can find for HR 669 that this would probably be in super fine print no matter how big of a deal it is. I think a lot of people in the salt water hobby are taking this bill out of perspective. No, it is not just about the Salt water fish, but a number of other animals too, and lets be honest, the average joe couldn't give a rats a$$ about fish.
Just my 2 cents...