In fact, the tail of goldfish can be longer. However, the specific speed and degree of regeneration will be affected by many factors, such as the size and location of the wound, whether the wound is infected or not. Usually, in a month or so, the goldfish's tail wound will heal, and then gradually start to grow again.
In order to accelerate the growth of goldfish tail, we can take some measures. First of all, the water quality should be kept clean and stable, which helps to prevent wound infection and promote physical recovery. Secondly, protein and vitamins contained in fish food can be increased, which is very helpful for the growth and health of goldfish. In addition, adding some plants to the fish tank can provide a safe and comfortable environment for goldfish, which helps to reduce their stress and recovery speed.
In a word, the goldfish's tail can grow longer, but it should not be excessively intervened and needs proper care and attention. If the goldfish has a wound or injury, we should check it in time and take corresponding measures to ensure its healthy life.