I know this is way off topic but do you understand the logistics of all of that? It's bad enough trying to get the mongrel dogs registered, what makes you think that getting feral/rural cats (the ones who do most of the damage) registered is going to suddenly make them stop killing? That's if you could even get them registered in the first place, many cats won't even wear a collar. Sure, slap an extra $90 or so on the people whose cats lounge around inside all day and night, that'll fix the wild cat population. In fact, why not introduce a mouse and rat registration fee? Then billions of taxpayer dollars can be spent on getting little plastic tags for all the mice and rats in New Zealand and fix that issue too! Genius.
And on the original topic, it's pretty appalling that they wouldn't make it clear that only dead fish should be thrown in the trash. Yeah people do let their fish air drown but saying it's okay is a different story.