The reason why kissing fish kiss is because they are "fighting". For kissing fish, the act of kissing does not represent love, but is simply a way of attacking. They have long serrated lips and attack each other when they kiss. In this kind of kissing battle, the loser will be the first to open his mouth and run away in disgrace.
The kissing fish will kiss when fighting for territory. It is a relatively mild temperament of the fish, the general will not take the initiative to attack other fish. But if other kissing fish invade their territory, they will attack each other by kissing to fight for the ownership of the territory. When one of them is defeated and runs away, they do not pursue the other, but clean up their own territory.
1. The breeding density is too low: If only a few kissing fish are kept in a large fish tank, each fish has enough space to grow, and they will not fight for territory. So they don't kiss.
2. The age of the fish is not enough: The newly born fish does not have the habit of kissing. Small fish to grow about 2 months after the time, there will be kissing habits. If they are too small, they will not kiss each other.
