There are many reasons why rainbow sharks do not eat food, such as:

1. Temperature: higher or lower temperature will speed up or reduce the metabolism of rainbow sharks. Rainbow sharks have to work hard to adapt to this change, so Not in the mood to eat.

2. Illness: When the rainbow shark is sick and unwell, will refuse to eat. The breeder should always observe the growth state of the rainbow shark. When the rainbow shark behaves abnormally or does not eat, the breeder should consider whether the rainbow shark is sick, and then carry out the necessary physical examination and treatment, so that the rainbow shark can recover as soon as possible.