Mustard gas Betta care sheet

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Betta fish come in many color changes and shapes, making them an extremely popular choice for aquarium fish with hobbyists worldwide.

In this guide, we take a detailed look at the beautiful mustard gas betta, including how to care for the fish and where to buy them.

What is a mustard gas betta?

The mustard gas betta is an absolutely stunning form of the betta fish. These fish are bicolor or, in some cases, multi-colored bettas with different colored fins and bodies.

The fish’s body is usually dark in color, usually blue or green. The flowing fin is usually orange or yellow, with the color spreading outward from the body in cloud-like waves, hence the name of the strain.

Sometimes the variety is mistakenly called chocolate because the fin color is similar. However, the chocolate version of the betta has a brown body. You can also find the mustard gas betta known as the paradise betta, but that’s just another name for the same strain.

How big do mustard gas betta fish grow?

Bettas of this species generally grow to a maximum of three inches in length, although many are smaller.

Your fish’s growth rate depends on its genetic makeup and ancestry.

What about the lifespan?

Betta fish are expected to live between three and five years, although in some cases they can survive longer. Your pet’s lifespan depends to some extent on how well you take care of their tank and how good the nutrition you give them is.


This Betta first appeared in 1999 when an American breeder named Jude Al introduced the fish to the hobby. According to Al, it took 13 years to make his “pure” betta. Most of these fish today are produced by crossing or imitation.

This species is primarily bred in Southeast Asia, and most betta enthusiasts agree that the current stock is greatly diluted from the original fish.

Are mustard gas bettas rare?

In short, yes!

A mustard gas betta directly descended from those originally bred about 20 years ago is an incredibly rare find. Most of the fish you see these days are from a male mustard gas betta and a female of a different species.

Many of the fish advertised as mustard gas betta are just two-tone fish with tails and tones similar to real mustard gas fish.

Mustard gas turns color

In many ways, it is good that hobbyists have started to overcome this species of betta, as we can now see this rare fish in many different and beautiful colors.


Blue was the main body color of the first mustard gas betta, and it’s still the most commonly seen. This color looks stunning, especially when contrasted with the fish’s signature mustard or orange tail.


If you find a green example of this fish, you’ll be delighted! The bright green shimmer sometimes extends into the tail fin and makes this color variant of the Betta a breathtaking addition to aquariums.

Orange and blue

Orange and blue mustard gas bets have colorful bodies that outshine the typical matt mustard color of the fish’s fins.


The black body mustard gas betta is a beautiful fish! The deep black hue of the creature’s body contrasts sharply with the mustard fins, as does the black outline of the caudal fin.

Dragon scale

The dragon scale is a rare mutation of the mustard gas betta in which the scales have a metallic sheen. This color morph is most commonly seen in blue, although green fish are also occasionally seen.

Tail types

The main characteristic of the mustard gas betta is the color of its tail and other fins. There is no standard tail shape for these fish, which means there are many tail shapes to choose from. Many breeders focus on making fish with a specific type of tail. It is therefore worthwhile to look for the products you want from online retailers.

Crescent moon

Crescent is the most abundant species of tail gas from mustard gas betta and is carried over from the original examples of this unusual fish.

The tail fins of the mustard gas crescent betta fish form a crescent shape, with the entire 180-degree tail spreading spectacularly.

Full moon

The full moon betta has a tail that looks very similar to that of the crescent moon, although the tail’s circumference exceeds 180 degrees.


Crowntail Bettas are another common and popular variety. The fish’s anal and dorsal fins have overlong rays that give the fins a prickly appearance, like a crown.


The delta tail initially looks very similar to the crescent, but the shape is more triangular when fully stretched.

Rose tail

The rose tail is a variation of the crescent tail shape. This shape has many folds of skin that give the tail the appearance of rose petals that overlap.


The frequently seen Veiltail falls down like a veil, as the name suggests.


Like the male of any species of Betta fish, the mustard gas betta is very territorial and will be extremely aggressive towards other males. This species does not do well when held in with fin tongs, which would turn the betta ‘s fins into a meal.

Bettas are fairly active swimmers and spend much of their time patrolling their home spot. These fish are wonderful centerpieces and can share a tank with a few small, peaceful companions who will not disturb the betta. Basic dwellers like Corydoras catfish are good tank mates.

Tank requirements

Betta fish are not particularly demanding when it comes to caring for them. However, you need to provide a sufficiently large tank for your fish. Bowls and vases are not suitable for bed fish! So you need to invest in a tank that will work for your Betta as detailed in this article.

Bettas are surface eater and labyrinth breathers who regularly have to come to the surface of the water to breathe. Mustard gas betta fish also have lush, flowing heavy fins. Therefore, a shallow tank is best for these guys so that they don’t have to put in too much effort to swim to the surface of the water.

Wild bettas can jump if they have to move between bodies of water during the dry season. Domesticated bettas can jump too, so you’ll need an aquarium with a coverslip or lid.

Water parameters

Bettas are tropical fish that require water temperatures between 72 ° and 82 ° Fahrenheit. It is also important that the water temperature remains stable as bettas are very susceptible to thermal shock. So you will need a heater and aquarium thermometer so that you can keep an eye on the water temperature.

The water pH should be in the range from 6.0 to 7.5 with a hardness between 2 and 12 dKH.


Clean water is very important to your Betta fish. So you need to install an efficient filtration system in your pet’s tank.

You also need to do a partial water change every week and thoroughly clean the subsurface with an aquarium vacuum cleaner.

Diet and nutrition

Although Bettas are classified as omnivores, their natural diet consists mainly of fleshy protein in the form of insects and insect larvae, supplemented by a small amount of plant material.

You should feed your betta a staple diet consisting of betta pellets and tropical flakes containing frozen or live blood worms, daphnia, brine shrimp, and other meaty proteins. Ideally, you should feed your fish twice a day and only offer what the betta will eat in a few minutes.

Also, you should include one day each week that you don’t feed your fish at all. On this fasting day, your fish’s digestive system can process the food it contains without becoming overloaded and blocked. Constipation and gas are common problems in Betta fish that can be prevented by including a fasting day in your pet’s weekly feeding program.

Where can I buy a mustard gas betta fish?

Mustard gas betta fish are extremely popular and also in short supply. That makes it a little difficult to get hold of this species of fish.

Specialized betta breeders are the best place to buy these rare fish. Check out Pinterest, other social media sites, grower blogs, as well as online auctions, though you may then be struggling with international shipping.

You can occasionally find mustard gas bettas for sale in fish stores, although these are often counterfeit rather than the real item. That said, if it’s just the look of the fish that you want, then breeding and genetics may not be a priority for you.

Mustard gas betta prices vary depending on the color and shape of the tail. However, we found this species on sale online starting at around $ 30.

Final thoughts

The mustard gas betta is a beautiful and rare color morphism of the popular betta fish.

Since they are very hard to come by and can be expensive to purchase, you need to make sure that you are giving your aquarium fish the best possible care to maximize their lifespan. Check out the other articles on our sister site to find out how you can give your Betta fish the best possible care.

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