Mid-sized fish such as blue scorpion and pearl vest, kissing fish, parrot fish, angelfish and so on are better. Because the adult Lan's fish swims slowly in general, it is easy to give the impression of a gentle and elegant temperament.

Lan's hanging is actually very aggressive. It will attack the weak in the same group, and it will also attack other groups with small individuals. Therefore, the polyculture of medium-sized fish will not be affected, and the small fish are vulnerable to the attack of the blue scorpion.