Emerald Dwarf Rasbora: Appearance, Lifespan, Size, Diet, Care, Tank Mates, Breeding & More

Have you ever seen a fish as breathtakingly beautiful as the Emerald Dwarf Rasbora? This fish is a real eye-catcher with its vibrant green color and shimmering scales. But its looks aren’t the only thing that makes it a perfect addition to your aquarium.

The Emerald Dwarf Rasbora is a friendly and peaceful fish that can live up to 5 years with proper care.

This blog post explores everything you need to know about this fascinating fish, including its appearance, lifespan, size, diet, care, tank mates, breeding, and more.

Brief description of Emerald Dwarf Rasbora

Emerald Dwarf Rasbora is a beautiful freshwater fish that makes an excellent addition to any aquarium. The Emerald Dwarf Rasbora, a type of fish, can only be found in Lake Inle in Myanmar.

Unfortunately, this lake is going through rapid changes, which could endanger the wild populations of this species. However, the fish breeds easily, so more can be found in the aquarium trade, which is good.

These tiny fish are highly active and curious in a well-decorated environment and can often be seen playing or sparring with others. Emerald Dwarf Rasbora are typically coral pink or orange with several thick emerald green stripes that shimmer in the light, creating a beautiful display as they swim around the tank.

These fish are peaceful and easy to care for, making them an excellent choice for beginner aquarium enthusiasts.


Body color and size


Emerald Dwarf Rasboras are beautiful fish with a stunning array of colors. Their bodies have a coral pink or orange base color, enhanced by thick emerald-green stripes. Some stripes may have a purple or blue hue, making them even more eye-catching.

These fish are small, with an average adult size ranging from 1 to 1.5 inches in length. Despite their small size, they have a lot of personalities and will provide a lively and active display in your aquarium.

Male and female Emerald Dwarf Rasboras have subtle differences. Males are typically smaller but have more vibrant colors, including red or orange fins. Females, on the other hand, have transparent fins and a duller overall coloration.

Distinctive features

One of the most striking features of the Emerald Dwarf Rasbora is its bold coloring. Their bodies are a coral pink or orange color with thick stripes of emerald green running along their sides. The stripes can even have hints of purple or blue depending on the lighting in the tank. These colors create a beautiful display as the fish swim around their aquarium.

Additionally, the Emerald Dwarf Rasbora has a large dot on both sides of its body near the base of the tail. This dot resembles an eye and helps to trick predators in the wild. Another interesting feature is their semi-transparent scales around the gill plate. These details combine to make the Emerald Dwarf Rasbora a truly unique and beautiful addition to any aquarium.

Sex differences

Emerald Dwarf Rasboras have subtle but distinct differences between the sexes. Males are slightly smaller and more vibrantly colored, with their fins appearing red or orange.

In contrast, females have transparent fins and are larger with rounder bellies. These differences become more pronounced during the breeding season, when female Emerald Dwarf Rasboras become noticeably plumper, and males gain more coloration.

Despite these differences, males and females are peaceful shoaling fish that enjoy each other’s company. Keeping eight or more of these tiny fish will ensure they feel comfortable and exhibit their natural behavior in your aquarium.

Average lifespan of Emerald Dwarf Rasbora

Emerald Dwarf Rasboras have a relatively long lifespan for small fish, with an average of three to five years if taken care of properly. Providing them with a healthy environment is vital to achieve this longevity.

Factors such as water quality, filtration, and proper diet can play a key role in their lifespan. These fish are known for their peaceful temperament and are generally easy to care for in a freshwater aquarium.

You can enjoy the beauty and companionship of these unique and stunning fish for several years by providing the right conditions and taking proper care of them.

Factors that may affect lifespan

Various factors can impact the lifespan of Emerald Dwarf Rasboras, so it’s essential to take good care of them to ensure they live a healthy and happy life.

One of the most important factors is the water quality in their tank, as poor water parameters can lead to various health issues and shorten their lifespan. Additionally, if they are not given a well-balanced diet with plenty of protein and nutrients, they may not grow properly and become sick.

Stress is another factor affecting their lifespan, so providing them with plenty of hiding spots and other fish for a company is crucial. Finally, genetics and breeding can also play a role in determining how long they live.

By providing your Emerald Dwarf Rasboras with a clean, well-maintained tank and a healthy diet, you can help to ensure they live a long and healthy life.

Typical size of Emerald Dwarf Rasbora

The Emerald Dwarf Rasbora is a small freshwater fish that measures between 1 and 1.5 inches long, making it a great addition to small-sized aquariums.

However, it is essential to remember that these fish are shoaling species and must be kept in groups of six or more to thrive. When you purchase them young, they will likely be only half an inch or so in size, but they have a steady growth rate and take little time to reach their maximum length.


Natural diet

The Emerald Dwarf Rasbora, in its natural habitat, feeds on small insects and aquatic organisms. To mimic their natural diet, provide them with live or frozen brine shrimp, daphnia, mosquito larvae, and other small invertebrates. Commercially available foods like flakes or pellets can also be given to them, but ensuring the food particles are small enough for their tiny mouths is vital.

Feeding them twice daily in small portions is recommended to prevent overfeeding, which can lead to health issues. It’s important to note that they are not picky eaters, but their diet should be varied to provide them with essential nutrients. Keeping up with their natural diet will keep them healthy and happy in captivity.

Recommended diet in captivity

In captivity, Emerald Dwarf Rasboras are omnivorous and opportunistic feeders. They will accept dried foods such as flakes or pellets, freeze-dried daphnia, bloodworms, brine shrimp, and tubifex. However, it’s essential to ensure that they receive a balanced diet with high protein content.

If you want your Emerald Dwarf Rasboras to breed, it’s advisable to feed them a high-quality protein diet. In the wild, these fish prefer a mostly protein-rich diet that includes insects. They will also eat algae, zooplankton, and plant matter if available.

You can replicate their natural diet in captivity by providing a varied diet of protein-rich foods and plant matter. Taking care of your aquatic pets is essential for their health and well-being. One common mistake that many pet owners make is overfeeding their pets. Overfeeding can lead to health problems and poor water quality, harming your pets.

Feeding schedule

Taking care of your Emerald Dwarf Rasboras is essential to ensure they stay healthy and content. Establishing a feeding schedule is a crucial step in their care routine. They are omnivorous fish in the wild and feed on protein-rich diets that include insects.

In captivity, they will eat dried foods like pellets or flakes, but we recommend giving them various foods for optimal health. You can provide them with live or frozen foods like brine shrimp or daphnia once a day. They will also appreciate some vegetable matter like boiled peas or spinach.

Feed them small amounts that they can consume in two to three minutes, and consider dividing the total amount of food into two or three smaller feedings per day. Watch your fish to ensure that they are eating well, and adjust the quantity and frequency of feeding based on their behavior.


Tank requirements

A 10-gallon tank would suffice, but it’s better to go for a 20-gallon aquarium as it allows you to keep a larger group of fish. It’s essential to have a suitable filtration system that can handle at least four to five times the tank’s volume to keep the water fresh and clean.

Aquarium decorations, such as live plants, rocks, and driftwood, should be added to the tank to give your fish a place to hide and destress. Providing a fine sand substrate will also make your Emerald Dwarf Rasboras feel more comfortable. Setting up the right tank requirements ensures your fish live a healthy and content life.

The Emerald Dwarf Rasbora prefers a dark-colored substrate at the bottom of the aquarium, resembling the loam substrate found in Lake Inle. It is advisable to use fine sand instead of gravel. It is important to note that these rasboras originate from clear waters, so they may not tolerate tannin-stained water very well.

Water quality

Maintaining good water quality is paramount for keeping happy and healthy Emerald Dwarf Rasboras. They come from crystal-clear waters, so aiming for a slightly alkaline pH balance is essential.

Invest in an accurate and reliable test kit to monitor temperature, pH, ammonia, nitrate, and nitrite factors. To mimic their natural habitat, keep the water temperature between 70F to 75F and a pH of 7.0 to 7.8. The water hardness required for the emerald dwarf rasbora typically falls within the 2 to 10 dKH range.

Emerald Dwarf Rasboras don’t need much space to stay happy, but a well-decorated environment is necessary. Dense vegetation, plenty of decorations, and a dark-colored substrate will make them feel right at home.

Maintenance routine

Regular maintenance routines help ensure a clean and safe environment for your fish. This can include weekly water changes of around 20%, using a reliable filtration system, and testing the water parameters regularly. Monitor the water’s ammonia, nitrate, and nitrite levels, and adjust accordingly.

In addition to water maintenance, regularly cleaning the tank, including any decorations and substrate, is essential. Remove any uneaten food and waste to prevent harmful bacteria buildup. By taking a few simple steps to maintain your tank, you can help your Emerald Dwarf Rasbora thrive in its home.

Tank Mates

Fish species that can be housed with Emerald Dwarf Rasbora

Regarding tank mates for your Emerald Dwarf Rasbora, choosing fish with similar temperaments and water requirements is essential. Good candidates include other peaceful small fish like Neon Tetras, Small barbs, and Small Types Of Catfish. It’s important to avoid aggressive or large fish that may bully or harm your Rasbora.

In addition, it’s important to consider temperature and water quality needs when selecting tank mates. Remember that Emerald Dwarf Rasbora are schooling fish, so keeping them in groups of at least six individuals is recommended. This will help them feel more comfortable, reduce stress, and enhance their health and well-being.

By choosing compatible tank mates and maintaining ideal water conditions, you can create a thriving aquatic environment for your Emerald Dwarf Rasbora and all its aquatic companions.



Conditions for successful breeding

The Emerald Dwarf Rasboras are enthusiastic breeders who often reproduce in ideal conditions without help. Though they scatter their eggs, they do not display caregiver behaviors, simplifying the breeding process.

The highest chances of baby fish surviving can be achieved by breeding them in a regulated setting. Prepare a tank for breeding by adding water that has gone through a cycle. Introduce spawning mops or plants with leaves. Afterward, place a pair that is already in a bonded relationship.

Alternatively, include a cluster containing several females and two males. It is essential to mention that having more individual fish will raise the chances of eggs being consumed.

At this juncture, it is advisable to provide food that is rich in protein. The process of spawning should happen swiftly. The female fish will deposit approximately 30 eggs inside the tank. The eggs are slightly sticky, which might attach to the tank’s foliage or decor.

It takes approximately 72 hours for eggs to hatch. Once the fish fry has hatched, it can survive eating the egg sac for three to four days before swimming freely. During this time, they can be fed infusoria or powdered fish food until they are ready to consume baby brine shrimp.

Final thoughts on Emerald Dwarf Rasbora

In conclusion, Emerald Dwarf Rasboras are a fantastic addition to any aquarium due to their peaceful nature, beautiful appearance, and ease of care.

These charming fish are playful and fun to watch as they swim gracefully around their tank.

As these fish enjoy living in groups, it is essential to keep them in a tank with other Emerald Dwarf Rasboras to ensure that they exhibit their natural behaviors to the fullest.

Proper care and maintenance of the tank, filtration, and keeping the water at suitable parameters will ensure their health and longevity.

Overall, if you are looking for a colorful and fascinating fish that is easy to care for, the Emerald Dwarf Rasbora is an excellent choice for any aquarium enthusiast.