Zebrafish can do without freezing, but peacock fish can't. Although it is cold-tolerant in tropical fish, the lower limit is 15℃. Zebrafish swim fast, while guppies are slower than zebrafish, so guppies are at a disadvantage in the process of grabbing food. Don't raise too many zebrafish if they are mixed, in case the guppies don't have enough food. Zebrafish and guppies are both gentle, and don't want the same kind or bite each other. Just timid at ordinary times, don't be scared often. Once they are used to feeding, if they find someone passing by outside the fish tank, they will gather on the water and swim in the direction of people. Just feed both kinds of fish with artificial feed.