Baby Koi Fish : How To Raise Baby Koi

By Alberto Roy

Updated on:


Everybody is familiar with baby koi fish because of their beauty in the water. However, not many people are aware of the work involved in the care and raising of them.

From a newborn koi all the way to a mature one. These fish require a lot of work. But, it pays off in results , and beautiful Koi!

If you’re considering raising Koi, you should consider buying young ones. They’re less expensive and you can observe their development in coloring as well as shape and size. But, there are a few things to be aware of when raising young Koi.

The first thought people have when they hear “koi” is an attractive, vibrant fish. While this might be true for adults it’s not the case for newborn koi fish.

Let’s take brief look at some photos of newborn Koi (and video) and learn more about their colors at this time and also some additional koi fry information!

What Does Baby Koi What Does Baby Koi Look Like?

Baby Koi Fish 3

Baby koi, often called koi fry, are smaller versions of adult koi, but they lack the beautiful, vibrant colors that koi is famous for.

Baby Koi Fish Information

The baby koi fish are mostly without color, and sometimes even brown. It is possible to see the signature orange or red color on a koi fry, however it’s not as distinct or vibrant like it would be once it is grown up.

Let’s take it a step further…

The time when koi fish eggs develop (see the koi egg pictures like) The koi fry are so small that you cannot even be able to see their reflection in water. In fact, you may not even see them floating around in your koi pond during the initial few weeks.

During times of feeding, maintain an eye on the fish to avoid underfeeding and overfeeding. If you see food visible after koi have finished eating, you’re overfeeding your fish. Food left over will cause harm to the water. If you’re not feeding your koi, look out for dead or weak fish.

Koi fish generate thousands of eggs while it’s spawning. But, it’s impossible for a fish owner to house and take care of thousands of fish. Many of your Koi will die in the natural way.

Sometimes larger koi may consume smaller ones. Growth and size differ from species to species, so you should be conscious of which koi are growing together inside the pond. Goldfish, who are often times raised by koi are also known to eat on eggs from koi and fry.

Baby Koi Fish Breed

Baby Koi Fish 1

The primary factor that determines the survival of koi fish babies is the way spawning occurs. Koi are known for feeding on their children, which is why placing breeding fish in separate tanks for spawning is essential.

The baby koi born into the koi pool are bait for fish literally. Removing the adult fish out of the spawning tanks quickly after spawning has finished and prior to the hatching of eggs is crucial.

Eggs hatch in four days of being laid, which is why the tank should be constantly monitored and adult fish moved-returning to the pond, or moved to a different tank to recover in the event that eggs first appear.

Koi are extremely tough fish that are easy to handle once they’ve been born, provided the proper precautions are taken to protect them safe from predator fish.

Create spawning mops for fry that they attach to. The fry of a newborn koi instinctively want to cover themselves and attach themselves to spawning mops that are in the tank.

At this point, the baby koi aren’t equipped with a mouth and swim bladder, nor vents, or fins. Don’t feed the fry of koi in this stage. They survive by eating off the egg sac that remains connected to the.

However, this is changing rapidly…

Baby Koi Fish Introduction

Koi grow very fast they eat the yolk of their eggs then they eat algae and other species in your pond. At approximately one month old, they’re already an inch in length.

Baby Koi Fish 2

Within 2 to 3 months They can grow as long as 3 inches! In the following four years, the young Koi carp will continue growing until they reach adult weight of around 24 inches.

This video viewers can watch how adult Koi egg spawning as well as the baby koi’s hatching, as well as the growth that the newborn koi undergoes during many months.

Find out more about the speed at which the koi develop and then check out our growth chart for koi in the guide to get an illustration.

What is the time that Baby Koi Change Color?

The baby koi will begin to develop color within a couple of weeks. The color will intensify and get more noticeable within two to three months. They continues to alter and grow as they expand.

The color of a fish can be extremely different depending on genetics, their type and other aspects. For instance, I’ve seen one-year-old koi who are brown.

Baby Koi Fishes 1

Be aware that the most reputable breeders of koi only keep a small portion of their fry since certain breeders will not achieve the striking, stunning hues that owners of Koi are seeking.

What is the best way to tell the difference between a baby and a Koi is a Goldfish?

If you keep both goldfish and koi inside your fish pond you will be able to discern if the young fish are goldfish or koi by their hue. Goldfish start out completely black and remain as such until they’re around an inch or one and a half inches in length.

It’s just as simple. They could be any colour that koi are usually are known as (just not as well defined as a mature Koi) however, they aren’t likely to be black.

Certain varieties of koi have been breed to be completely black however, unless you have all black fish in your pond, you’re unlikely to get black babies.

The color of the koi depends on their age, and they will change and grow in time, however, only in specific circumstances will they appear completely black as a newborn goldfish.

Air stones can be used to provide ample oxygen into the tank. In the first 2 or 3 days, the baby Koi breathe via the blood capillaries around the egg sac, which is connected to the stomach.

It’s crucial that fry receive sufficient oxygen. Check to ensure that air stones function in a proper manner at all times, or the baby koi could die.

Baby Koi Fishes 2

Keep an eye out for fry to begin swimming. After two or three weeks fry develop fins, a mouth, and other organs. At this point they’ll climb to the uppermost part of the tank, taking a few breaths of air into their swimming bladders.

This will allow them to start swimming around the tank. Fry and then gather around air stones. This is a signal that they are prepared for feeding.

Feed your liquid fry often throughout your first few days. Frying should be served in in small portions four to five times per day, depending on how they develop.

You can also offer strained hard-boiled eggs yolk for the first couple of days to increase how big their stomachs are.

Give newly born brine shrimp larvae following one week. These brine shrimp eggs are tiny enough to be eaten by fry at this time.

Change from liquid to powdered fry in week two.

Continue to increase the amount of the meals offered to fish increase in size over the next three to four months.

The most important thing to consider is whether it is not too large for fry to eat, contains a lots of protein, and is served often throughout the daily. The waste and trash must be cleaned up regularly, since fish begin to develop the capacity to consume food.


Baby Koi Fishes

If koi eggs are fertilized they stick to the plants in the pond for up to three days. When they hatch they fall into in the depths of the water. They are referred to as Koi fry. After being they are released from their yolk sacs they will hide in the pond plant.

The koi that are born do not usually require feeding during the beginning. They feed on their yolk sacs as well as small organisms that live in ponds. If the koi fry hatch outside of a pond they’ll require specialized feeding.

When a baby koi is born and starts swimming towards the surface, it’s at its best to feed. Young koi require a different meals as their adult counterparts. One aspect to be aware of is the size of their mouths.

They are extremely small and their mouths are even smaller! For the first month of life, liquid foods as well as very small suspended particles are a good choice. Feed your young Koi four times per day.

HOW DO YOU RISE A BABY KOI After they’re Born

Although some koi can be removed naturally, owners of koi employ a method called culling to help keep the numbers of koi fish to acceptable levels. Culling is the process that eliminates certain fish from the pond of koi.

The removed koi are generally put to death. Although culling can be cruel, it’s important to remember that it’s vital for the well-being of the koi living in the pond.

Overcrowding can be harmful to your koi as well as your pond. Culling can ensure the health and well-being of your koi in an environment that is safe.

Culling is recommended every month during the first three months. In the first and second culling, eliminate all but 80% of the newborn Koi. After the 3rd month of culling, eliminate the 65%.

Baby Koi Fish 1

Although this may seem to be a lot, this is actually bringing the number of fish to a manageable amount. When you are culling, remove Koi that exhibit indications of aggression or weakness. Remove any koi that shows indications of deformities.

These are very common and are particularly evident in their fins, spines and tails. This page on the Australian Koi Association website has more details on this.

The process of raising koi is difficult, particularly during the beginning stages. However, watching the koi’s baby grow to become mature creatures is the greatest koi-keeper’s reward!

It is a period of adjustment However, with these helpful tips we’re certain you’ll be right! Are you able to offer any suggestions regarding raising a Koi babies? Leave us a message or email us using our contact page.

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