Original comment: 普通的河取种因为经过驯化,捕食本能被消解不少,但是和其他种类混搭,会因为嬉戏打闹把其他种拉到水下,因此不能混养。 至于“鬼河童”,一些喜欢斗油的主人喜欢饲养,因为它们只有野性。碰到其他种直接开打,戴帽魔理沙和贝壳魔理沙都吃不消
The typical Nitori has been domesticated so that its instinct of predation is greatly reduced. However, owing to its playful and prankish nature, it would pull the other types into water. Raising with other types is thus forbidden. Some pet owners who love yu-fight (analog to cockfight) like raising "Oni-Nitori" for their wild nature. It fights with other types without hesitations, making it inappropriate to be raised with other types even Hatted Marisa and Shell Marisa.
You're reminded that there's a subtype of yukkuri Nitori called "Oni-Nitori". It often acts violently and is difficult to domesticate. Avoid this subtype unless you have some special interests. It'd be much easier to pick the yukkuri Nitori as it's impossible to produce counterfeits of it. One can buy a Nitori from a licensed pet shop.