Rosetail Betta Fish Care Guide

rosetail betta

Last updated on July 25th, 2022 at 12:21 pm

The rosetail betta is a gorgeous fish that’s full of personality and can be really fun to keep as your pet. They come in many different colors, so you shouldn’t have any trouble finding one that matches the décor of your home just right!

Rosetail bettas are the newest type of tail style in this hobby. They have a lovely, long, and flowing tail that is usually larger than their other fins. It’s not uncommon for them to look like they’ve been dipped in oil!

The rosetail gene originated from Siamese fighting fish as well as swordtails. It’s a dominant gene that appears in both males and females, but only the males can pass it on to their offspring!

The rosetail is one of the most popular types of betta tail designs these days because its long-flowing fins are absolutely stunning! Some people have had problems with keeping this type of betta alive, but it’s actually a genetic disease so there are ways to avoid that.

Rosetail bettas typically live for about three years in captivity and they’re active fish who loves swimming around the tank all day! These fish can be hard to care for if you don’t know what you’re doing, but that’s why we’re here!

The long flowing fins are absolutely stunning and they make these fish one of the most popular types in this hobby today! Rosetails are hardy creatures that love swimming around their tanks for hours every day.

We provide all the information you need to set up a beautiful, happy rosetail betta tank here.

What is a Rosetail betta?

A Rosetail betta is a type of fish that has a long filament-like tail. They are called rosetail because they have the appearance of rose petals from behind. This fin arrangement can make them difficult to keep in a tank with other fish, as their tails often get caught up on other fins and body parts when they pass by.

Origin of rosetail betta

rosetail betta

Rosetail betta fish is a relatively new type of variety to the aquarium trade. They’ve only been around since about 2009 and have become very popular among freshwater hobbyists due to their unique appearance, personality, and care requirements.

The story behind this particular rosetail species is that they come from Thailand where local breeders were looking for traits in the betta population. They wanted to find a betta with an extended fin that could be showcased in their jewelry. This type of fish was then discovered and refined for the aquarium trade, which is why you often see Rosetail Betta being called by other names such as “Jewelry Fish” or “Pendant Fish”.

The most unique trait about this betta is its extended fin. The more common veiltail and crowntail varieties have an elongated body that ends in a rounded point, but rosetails are characterized by the two long extensions of the caudal fins which extend past the other fins like feathers on either side of a bird’s wing.

Females will also develop a red band that appears just before the second fin and will become a full coat of coloration as they mature.

The personality of this fish is very similar to that of most other bettas, but their care requirements are more delicate than any others due to the extended caudal fins which take up about half of its body length.

Andinoacara Pulcher (Blue Acara Cichlid)

Species profile

rosetail betta

The Rosetail Betta is one of the most popular breeds of betta fish. It has a long, flowing tail and often also has fins that are twisted into loose whorls resembling rose petals. They can come in various colors including red, blue, white, pink, or yellow but they lack some color pigments, so the colors are muted.

Rosetail betta fish often have a long body that is rounded in profile and they will grow to around five inches (12cm) or more if well cared for. Rosetails need an aquarium at least three gallons in size as they can be territorial with other male rosetails of the same type.

The rosetail betta is a relatively easy fish to care for and they can be fairly inexpensive, with prices starting at around $12 (USD) but going up considerably if you want one of the more popular color variations. Generally speaking, these are hardy creatures and will not need special consideration on your part as long as the conditions are right.

Color and appearance

The rosetail betta has a vivid red color that is more intense than the standard long-finned betta. The fins of this variety are also distinctive in their appearance, as they have many small and tightly compacted feathers on them.

Range and habitat

Rosetail betta is a small, brightly-colored fish originating in Asia. They can be found living on the surface of freshwater ponds and streams as well as rice paddies. Rosetail bettas are typically red with brown markings along with their bodies, but they have been known to change colors depending on the conditions around them.

Rosetail betta size

Size can vary depending on the type of breed. Some are less than an inch long and others reach four inches or more in length. The average size is 2 to 3 inches, but this also depends on diet and maintenance for your specific rosetail betta fish.

Tank size

The recommended aquarium size for one rosetail betta would be around five gallons of water (roughly 11 liters) and the recommended aquarium size for a breeding pair would be around 15 gallons of water (roughly 37.85 liters).

Some people say that a larger tank is needed for the rosetail betta size, but this is not necessarily true. Most aquatic experts say that a larger tank can be beneficial if you plan on keeping other fish or invertebrates in it with your rosetail betta.

Keep in mind that these sizes are only recommendations, as there is no perfect rosetail betta fish tank size.

Life cycle

Males can become aggressive at breeding time, and females will release eggs when they are ready. The female’s belly turns a dark reddish-brown as she prepares to release her sperm into the water column or onto an object in the tank for fertilization. She may start chasing other fish if there are any near her spawning site during this period.

One male and one female in the same tank will usually produce fry. If you want your Betta to spawn with another fish, make sure both are healthy before adding them to the same aquarium. Female Bettas can lay eggs even if there are no males present.

5 Popular Female Betta Fish Types

The eggs are round and sticky, but they will not cling to plants or objects in the tank very well. They need a lot of care during incubation because they can succumb to fungus easily if left alone on any plant material or decoration for too long. The eggs hatch after about 24 hours, releasing small fry that are about 0.25 inches (0.64 cm) in length and has large eyes.

Their mouth is on the underside; so they will not be able to eat dry foods until their digestive system matures at about two weeks old and starts producing enzymes to break down the food.

They are able to survive on their own at about two months old and can breed when they reach sexual maturity between six months and one year old. The females will be bigger than males with an average lifespan of two to four years.

Are Rose Petal bettas aggressive or peaceful?

The rosetail betta fish is both aggressive and peaceful. They will usually be territorial around their food, territory, or the owner. When threatened they may attack and bite other animals that are in close range of them.

However, when not feeling threatened this breed can live harmoniously with others without any issues whatsoever. This behavior all depends on how the fish has been raised.

Rosetail betta care

rosetail betta

In order to keep the rosetail betta in good health, it is important that you feed them a variety of different foods. It is recommended that you feed them pellet food, brine shrimp, insect larvae (frozen or live), and chopped earthworms.

What they eat

Rosetail bettas are carnivorous fish and enjoy live foods like bloodworms, brine shrimp, white worms, and mosquito larvae. They can also eat freeze-dried krill or fry food wafers.

Tank mates

Rosetail bettas can be housed with other rosetails or long-finned fish. Do not house them with any fish that are less than half their size, as they will most likely eat the smaller ones! The one exception to this rule is clownfish which make great tank mates for a Rosie and provide many benefits.

Water condition

The water quality for your betta is critical to his health. The pH level should be between six and eight, with a temperature around 74 degrees Fahrenheit. If the pH level is too high or low it can create a toxic environment for your fish. You may also want to purchase an aquarium heater if you live in cold climates so that their water does not cool below the fish’s natural temperature.

When determining what type of water to use for your betta, you should purchase a reverse osmosis filter and add it to tap water or buy bottled distilled water from the grocery store. Reverse osmosis filters remove toxins like chlorine that can harm your fish, while also removing minerals that can cause water to be cloudy.


Rosetail betta breeding can be difficult, but with some patience and attention to detail, it is possible.

37 Amazing Types Of Betta Fish To Keep

The rosetail gene only shows up when both parents are carrying the trait. To breed for this specifically, two long-finned male or female adults will need to be bred together in order to create a fry that has a high chance of having the rosetail gene.

There are two methods to breed for this trait; one is a more intense method and the other, while still requiring some time and patience, may be easier for new betta owners as it requires less attention throughout. For both breeding methods, you will need a male or female with long fins and a male or female with short fins.

The less intense breeding method is to allow the adults to breed and observe any fry that may have been born as a result of this process. With some patience, it’s possible for these fish to grow into rosetail betta after about six months. This will also show up in all bets from one of the parents.

The more intense breeding method is to cross-breed two adults with either long or short fins, but not both at once. This means you’ll need three tanks set up and will be moving an adult betta from one tank to another during different stages in their life cycle: fry (eggs), young fry (young), and adult.

This method is more intense because the fry will need to be cared for in order to ensure their safety during the first few weeks of life, but it has a higher chance of producing rosetail betta as all bets from one parent should display that trait. The process can take up to three years before you’re able to see the rosetail trait in full effect.

At each stage, the fry will need to be fed and cared for until they reach a certain age before moving them into the next tank. This is done because it takes less attention as time goes on and also reduces any risk of introducing disease or parasites from one grow-out tank to the next.


A rosetail betta will usually live between two and three years.

Parasites and diseases

Some of the most common diseases and parasites that affect rosetail bettas are:

  • Dropsy (kidneys become over-filled with fluid)
  • Paraichthysiasis/Hexamita/Cryptocaryon (parasites in freshwater aquariums)
  • Fungus Morel fungi or Fungus in the tail
  • Ichthyophthirius/Chilodonella (parasites)

While these are some of the more common diseases and parasites that affect rosetail betta fish, they may also be exposed to ich or other bacteria. If you want your pet to live a long life and stay healthy, it is important to take care of them and do a water change every week.


The biggest predator of a rosetail betta is other fishes. There are many different types of predators that can attack and kill smaller fry or newborns: goldfish, koi, tetras, and others. If there is no big tank to keep them in, then they’ll probably get eaten if you have any of these fish.

Does it make good pets?

rosetail betta

No, they are not good pets. Rosetail Bettas seem to be very sensitive fish that require a lot of care and maintenance. They grow up to six inches long with an average lifespan of three years. Their fins can get ripped easily which causes them stress leading to disease or death as the tail will fall off if it is too damaged.

18 Amazing Types of Clownfish

This means that they will need a lot of space to swim and require clean water at all times which is difficult as the tank can get dirty quite quickly. Furthermore, their diet consists of live food such as bloodworms or brine shrimp which are not easy to replace when needed.

Are Rosetail bettas bad?

It’s a myth that rosetail bettas are bad. They just have different personalities than the traditional long-tailed and short-tail varieties of betta fish. Rosetails can be more aggressive, independent (some say they’re spoiled), or sensitive to certain sounds. If you want a peaceful pet who will acclimate to its surroundings easily, a long-tail betta is probably the way to go.

If you want an active and intelligent pet who will always be up for some exploration or mischief (e.g., sneaking out of its tank), then rosetail might be for you!

The most important thing when choosing your new best friend is to make sure you’re thinking about what’s best for the fish and not just your preferences.

Rosetail betta genetics

A rosetail betta is a fish that has developed its own unique genetics. This means it’s not necessarily the same as any other type of betta. Rosetails are bred for their long, flowing fins and tails with vibrant red colors on each fin. They can also come in shades of orange or pink, but the most popular color is red.

Rosetail bettas typically have one to three strips that go down from the dorsal fin all the way to the tail.

Rosetail betta female

Rosetail betta females are a much rarer and more expensive fish to buy than male rosetails. A female will grow in size, but not as quickly as the males do. Males can be identified by their long flowing tail that is made up of many different colors; whereas, females have shorter tails with only two or three colors.

What is halfmoon rosetail betta?

The halfmoon rosetail betta is a sub-category of the popular and well-known half-moon betta. Rosetail bettas are distinguished by their colorful tail fins that resemble the shape of roses, which they get from selective breeding to produce more color in their tails over time. While there aren’t many breeders of rosetail betta, they have become a popular variety of the once-boring half-moon.

In addition to their remarkable tails, these fish are also extremely active and intelligent. They will often explore every inch of your tank or vase with their sensitive fins in search of food and love from you!