CATDOLL : CATDOLL: Can crayfish be raised together with tropical fish?

No. The scientific name of crayfish is Procambarus clarkii, a well-known invasive species. Adults are 20~30 (body length, excluding claws) cm, weigh 400~500g, are omnivorous, burrowing, and have the habit of digging mud holes. In other words, a certain depth of silt is needed for long-term survival... yes, silt, and the water depth needs to be limited to less than 1m (don't really think of it as a shrimp, Procambarus clarkii and shrimp are two completely different species, and they will die in too deep water = =). It can be seen that the host is a fish lover, well... large fish, do you mean koi, oriental temperate ornamental fish; or tropical ornamental fish such as golden dragon, seven-star, and blood-red parrot? The mixed breeding of large fish requires the matching of habits and body size...

1. If the OP is raising omnivorous, vegetarian and relatively docile Oriental ornamental fish in a large open-air pond in the backyard, then crayfish are okay. However, it must be mentioned that you cannot be sure whether the origin of the crayfish is contaminated. It is very dangerous to put aquatic animals of unknown origin (especially wild or extensively farmed ones) into the tank without disinfection or inspection. You cannot be sure whether their pathogens will infect other aquatic animals.

2. This is probably the current situation of the OP. You are raising tropical carnivorous ornamental fish. It is true that crayfish have shells, but they are nothing compared to dragon fish. Furthermore, the tank is a small ecosystem. Putting in crayfish that need to dig holes and stir up mud will not only not have a positive effect on the water quality, but will damage the water quality. Furthermore, the analysis of pathogens above, OP, you understand.

In summary, if you just want to clean the water, there is no reason to release crayfish. For koi, you can release colored stone carp and other local ornamental fish for cleaning; if you want large tropical fish, releasing anglerfish (scavenger) would be a good choice.

Typing is not easy, please give me some points.

No. The scientific name of crayfish is Procambarus clarkii, a well-known invasive species. Adults are 20~30 (body length, excluding claws) cm, weigh 400~500g, are omnivorous, burrowing, and have the habit of digging mud holes. In other words, a certain depth of silt is needed for long-term survival... yes, silt, and the water depth needs to be limited to less than 1m (don't really think of it as a shrimp, Procambarus clarkii and shrimp are two completely different species, and they will die in too deep water = =). It can be seen that the host is a fish lover, well... large fish, do you mean koi, oriental temperate ornamental fish; or tropical ornamental fish such as golden dragon, seven-star, and blood-red parrot? The mixed breeding of large fish requires the matching of habits and body size...

1. If the OP is raising omnivorous, vegetarian and relatively docile Oriental ornamental fish in a large open-air pond in the backyard, then crayfish are okay. However, it must be mentioned that you cannot be sure whether the origin of the crayfish is contaminated. It is very dangerous to put aquatic animals of unknown origin (especially wild or extensively farmed ones) into the tank without disinfection or inspection. You cannot be sure whether their pathogens will infect other aquatic animals.

2. This is probably the current situation of the OP. You are raising tropical carnivorous ornamental fish. It is true that crayfish have shells, but they are nothing compared to dragon fish. Furthermore, the tank is a small ecosystem. Putting in crayfish that need to dig holes and stir up mud will not only not have a positive effect on the water quality, but will damage the water quality. Furthermore, the analysis of pathogens above, OP, you understand.

In summary, if you just want to clean the water, there is no reason to release crayfish. For koi, you can release colored stone carp and other local ornamental fish for cleaning; if you want large tropical fish, releasing anglerfish (scavenger) would be a good choice.

Typing is not easy, please give me some points~

Haha, crayfish is going to become a delicacy