Because you aren’t posting it inside of Suggestions ? This suggestion would still be a suggestion, and it wouldn’t turn into anything else. Just that it’s supposed to belong in here rather than the other places.
How about if you put actual effort into thinking then? Then again, if you actually did then you wouldn’t lose the suggestor role in the first place anyway.
There are a few reasons I don’t think this suggestion would be reasonable to implement. the main one is for optimization reasons, since the fish are only a visible effect that appear on graphics level 4 or above. Making them a gameplay feature would probably take even more of a toll on lower end devices than the game already does.
The part about different fish having different kinds of attacks is also quite a lot of work compared to the current system, which I doubt vetex would be willing to change. Even giving fish attacks in the first place seems like a pretty unlikely thing.