What Do Koi Fish Eat? [Explanation Here]

Koi fish is a very common species in Japanese and Chinese culture. They are considered ornamental fish due to their striking colors, which make them the protagonists of decorations and tattoos. If you are one of those who want to cultivate this type of carp, write down what koi fish eat and what are foods can be offered to them.

What Koi Fish Eat: Types of Food

The feeding of the Koi has its main function that of serving as an energy source and ensuring growth. For this reason, it is vital to supply quality food, including dry feed fortified with vitamins and minerals. Otherwise, sick animals can be raised which will affect the environment. For those who want to know what Koi fish eat, it is necessary to highlight what is necessary to include in the diet:

Industrial feed

In the market, there are different types of feed or specialized food for feeding Koi. These are designed with high amounts of protein essential to stay healthy and strong. Therefore, whether granulated or flaked, the food must contain:

  • The high amount of fish protein. This helps in the function of cell generation and muscle development. It is essential especially in times of growth.
  • Carbohydrates from elements such as soy flour. It is vital to supply the energy necessary for them to stay active.
  • Fibers to help digestive functions.
  • Healthy fats such as Omega guarantee the creation of hormones and as a source of energy.
  • Vitamins of the complex B, A, D, K, and E, as well as minerals that support growth and oxygen transport.

The diet must be balanced, nutritious, and balanced. During the hot season, the feed should be protein-based. On days when the temperature drops, it is important to supply wheat germ-based food to provide the energy necessary for vital functions.

About this article to know click here: How To Keep Fish Fresh While Fishing For Longer

Natural food

Koi eat natural food very common in the owners’ cupboards. This serves as a snack and treats that they love, so it is ideal to supply them as a snack. Among the natural elements that Koi fish eat are:

  • Fruits such as sliced ​​watermelon, peeled and wedged oranges, and tangerines.
  • Vegetables such as celery, lettuce leaves, pieces of potatoes, among others.
  • Cereals such as rice, pasta, bread, or corn tortillas are some of the things he likes.
  • Protein such as pieces of shrimp, worms, frozen fish, among others.

The idea is that after supplying these foods, the leftovers are removed with a strainer. In this way, they are prevented from decomposing and dirtying the water. Koi tend to eat the smallest fish, therefore, it is convenient to separate them until they are large enough to defend themselves.

What Koi Fish Eat According to Room Temperature

Knowing what Koi fish eat also involves serving sizes for different types of environments. This variety of fish usually regulates the metabolism according to the temperature of the water, therefore, they are more active during the summer and passive during the winter. Taking into account these needs, the amount of food that must be provided are:


During the summer it is necessary to supply food up to 8 times a day. The food must be rich in protein based on fish or vegetables, since the growth speed increases. It can be divided into 4 portions of industrial feed and 4 portions of natural type.


In the winter the feeding needs decrease significantly. In cases where the temperature is below 8 degrees, the total suspension of the food supply is recommended. The composition of the industrial feed for cold seasons must be based on wheat germ, due to its low-fat content and high fiber content.

An example of the eating routine can be:

  • With temperatures between 18º and 19º, give food three times a day.
  • If it is between 16º and 17º offer little food twice a day.
  • Between 14th and 15th, it can be offered between 2 and 3 times a week.
  • If the temperature oscillates between 8º and 13º offer food 1 or 2 times a week.
  • Below 8º, the feeding is suspended.

During this time, the proportion of fats in the body is reduced and other vital functions are activated. In addition, they recover the natural biorhythm. However, at the end of the cold season, they should be supplied with food rich in protein, to make up for the deficiencies they have suffered.

In conclusion, knowing what Koi fish eat is essential to keep them in good physical condition. Ideally, a variety of natural to industrial foods should be supplied to meet all your needs. The portions during the different seasons are also important, hence the integrity of the water and its well-being are maintained.