1. Reason: The tail shrinkage of arowana may be due to malnutrition. In the process of their growth and development, if the breeder cannot guarantee their adequate nutrition, it will lead to tail shrinkage, fin shrinkage and poor growth.

2. Solution: Breeders usually need to feed them more high-nutrition foods, so as to ensure their adequate nutrition. A small amount of feeding is needed many times, which is more conducive to their absorption.

1. Reason: Arowana's tail shrinkage may also be caused by too low water temperature or too large water temperature change, because they are sensitive to the change of water temperature. If the water temperature in the fish tank is not suitable for their growth, it will lead to their tail shrinkage.

2. Solution: The breeder needs to raise the water temperature to 28-30 ℃, but the heating speed should not be too fast to avoid causing other discomfort to Arowana.

1. Reason: If the water quality of raising arowana is too poor, it will also cause them to shrink their tails. Because the poor water quality will lead to more discomfort, it is common to shrink the tail and fin.

2. Solution: Breeders need to change water immediately to keep the water clean. If conditions permit, it is best to install filters to slow down the deterioration of water quality.

1. Reason: Arowana may be sick, and common diseases such as unfinished tail and rotten fins will have tail contraction. Most of this disease is caused by bacterial infection or poor water quality.

2. Solution: Breeders need symptomatic treatment according to their symptoms, and keep the water quality clean and the water temperature stable during treatment. If Arowana is not eating well, it can choose not to eat.