As soon as the fish meet, they are like two suckers firmly attached to each other. They can kiss and touch hard all afternoon, regardless of the influence of the surrounding environment. Don't think this is the affection between their lovers. In fact, this is a fighting phenomenon, fighting to defend your own space field! But this kind of struggle is not fierce. As long as one side gives in, the winner will not continue to pursue it, but will continue to bury himself in its cleaning work as if nothing had happened.