Koi Betta Fish Species Profile and Care

Koi Betta Fish, more commonly known as “bettas” or “Siamese fighting fish,” are a freshwater fish that originate from Thailand. They thrive in the warm climates of South Asian countries such as Thailand and Cambodia. In their natural habitat, they live in rice paddies, canals and swamps feeding off of insects, larvae and plankton.

Koi bettas have been developed from wild Betta splendens by breeders for over 2000 years in order to achieve the wide array of colors and patterns seen today. Bred originally by royalty, koi bettas can be found all over the world now with most being sold domestically. These showy fish are available in many different varieties with various color combinations and patterns.

Koi Betta Fish Characteristics:
Koi Betta Fish Species Profile and Care

Koi bettas are a type of Betta fish that were developed from wild B. splendens by breeders over 2000 years in order to achieve the wide array of colors and patterns seen today.

Koi Betta Fish Origin:

They originate from Thailand and thrive in warm climates such as South Asian countries like Thailand and Cambodia. In their natural habitat, they feed off of insects, larvae and plankton feeding on what is available in rice paddies, canals and swamps . These colorful fish have been developed over time through breeding; originally available only to royalty.

Koi Betta Fish Size:

These fish can generally grow up to 3-5 inches (8-13 cm) long and some types of koi bettas can grow up to 7 inches (18 cm) long while others do not get much larger than 1 inch (3 cm).

Koi Betta Fish PH:

The ideal pH for a koi betta tank is anywhere from 6.8-7.5 however they can survive within the range of 6.0-9.0 so it is very important that you test your water before adding them into their aquarium or pond habitat . Koi Bettas live in unheated tanks, ponds or outdoor pools during the winter months where the temperature falls to 50-55 degrees, but during the warm months they prefer water that is 78-82 degrees. They can survive in water temperatures ranging from 60-86 degrees so it’s important to know how much room you have in your tank/pond for them if they will be put into colder or warmer waters.

Koi Betta Fish Colors and Markings:

These fish come in a variety of colors, patterns and tail types which makes them very popular with both novice and experienced keepers alike. Some available koi betta species include veiltail, halfmoon (HM), crowntail (CT), delta tail (DT) , roundtail (RT) , double tail (DT) , and veil tail (VT) .

Koi Betta Fish Aquarium:

These fish need at least a gallon of water per inch of koi betta in order to thrive and live healthy. They can be kept in unheated tanks, ponds or outdoor pools during the winter months where the temperature falls to 50-55 degrees, but during the warm months they prefer water that is 78-82 degrees. They can survive in water temperatures ranging from 60-86 degrees so it’s important to know how much room you have in your tank/pond for them if they will be put into colder or warmer waters. The ideal pH for a KOI BETTA aquarium is anywhere from 6.8-7.5 however they can survive within the range of 6.0-9.0 so it is very important that you test your water before adding them into their aquarium or pond habitat .

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Koi Betta Fish Tankmates:

These fish can be kept with other types of tropical fish, but make sure they are not aggressive as koi bettas will sometimes harass and nip at smaller or more docile fish. They can also be kept with frogs and turtles however only if the frog is a bullfrog as others may eat your betta. Koi Bettas live in unheated tanks, ponds or outdoor pools during the winter months where the temperature falls to 50-55 degrees, but during the warm months they prefer water that is 78-82 degrees. They can survive in water temperatures ranging from 60-86 degrees so it’s important to know how much room you have in your tank/pond for them if they will be put into colder or warmer waters.

Koi Betta Fish Care:

Koi Betta Fish

These fish are a freshwater species and need clean water to thrive, minimum of once per week , 15-20 percent weekly is recommended. It is very important that you test the pH, ammonia, nitrite and nitrate levels before adding any koi betta fish into their aquarium or pond habitat as these levels fluctuate on a daily basis even with regular water changes . Ammonia levels should be 0 ppm at all times and nitrites and nitrates should be below 20 ppm to keep your koi betta healthy and happy. All fish tanks need an aquarium heater , especially if you are in colder climates where the water temperature falls below 60 degrees as they will not swim, eat or do anything without a heater in these temperatures. Aquarium heaters can be purchased at all pet stores but make sure you know the right wattage for your tank size before purchasing. The general rule of thumb is 1 watt per gallon .

Koi Betta Fish Lifespan:

Koi Bettas have an average lifespan of 7-10 years depending on how well their needs are met throughout their lives. They are susceptible to illness if the ammonia, nitrite and nitrate levels are too high so it’s important to keep the water clean and provide a varied diet.

Koi Betta Fish Diet and Feeding:

A varied diet is important for koi betta fish as they will not eat flake or pellet food. They are carnivores so they need to be fed red worms, blood worms , tubifex worms, brine shrimp, mosquito larvae , daphnia and plankton on a daily basis. They also love vegetables such as zucchini, cucumber and peas but make sure these veggies are thoroughly cleaned before adding them into your aquarium or pond habitat . Make sure the skin of the zucchini does not have any waxy residue from being waxed by hand at the grocery store because this can cause serious damage to your koi betta. These fish love fresh veggies, but make sure you remove any uneaten veggies from the tank after 4-5 hours as they can cause some serious damage to your aquarium or pond water .

Koi Betta Fish Breeding:

Koi Betta fish are very easy to breed and have been known to breed in a home aquarium with no special equipment needed. Males will flare their gills at females for mating purposes and will actually grab them by the fins once they have won over a female’s heart. Be careful not to keep two males together as they may fight if you catch them in the act. The gestation period for these fish is around 28 days and the female holds to 100 fry inside her “pouch” until they are born. The fry will emerge from their mother’s pouch with no yolk sac attached and will be able to eat immediately after birth.