They grow excessively fast if fed more than once every 2 weeks. They enjoy lots of light. They hardly roam unless underfed-underlit. They will eat fish if they swim into it... my cleaner shrimp seems to have paired with it as it is always up on it, picking at it.
It will only eat something that is almost dead already and actually finds the anemone to sit on it, literally committing suicide (poor blue gudgeon
Don't expect your "mini-carpet" to stay mini more than two months.
If you keep it fed/lit, it is far from aggressive and looks beautiful.
Of course --- this is all IME