Grass turtles bite fish. They are omnivorous animals and are not picky about food. But what they like best is small fish, shrimp, loach and other live bait. If grass turtles are mixed with smaller fish, they will take the initiative to attack small fish when they are hungry.

If breeders raise them with larger fish, there will also be conflicts. Because the turtle has a strong sense of territory, the larger fish will be regarded as invaders by them, and the turtle will attack the invaders, so the larger fish may also be bitten.

It is not recommended to mix with fish because they are shallow water turtles and cannot survive in too deep water level. If the water level is too shallow, only some small fish can be raised, and small fish are easily caught by grass turtles, so they are not suitable for polyculture together.

In addition, grass turtles like amphibious environment, so they need to build a balcony or gentle slope when breeding, so that they can grow and develop better. However, building balcony and gentle slope will affect the activity space of fish, so it is not suitable for polyculture together.

There is also the high metabolism of grass turtles, which seriously pollutes the water quality. Relatively speaking, fish have higher requirements for water quality. If they are mixed with fish, fish may not adapt to water quality.