What is Harlequin Rasbora: Know about the Fish Breed and Profile

Harlequin Rasbora

Are you an aquatic life lover? If yes, then the fishes are the perfect pet for you if you want one, they are peaceful and amazing as a pet. An aquarium at your home looks beautiful, and it also works as a good ornament in the home interior. So if you are looking for a new aquarium or a new fish variety in an existing fish tank, the harlequin rasbora is a perfect choice for you. Harlequins, a metallic color small fish that can easily be adjusted in every aquarium environment. 

The harlequin rasbora is a popular variety of fish that can be found worldwide. Moreover, many people love to adopt and feed this fish as caring is simple. Generally, this fish is for a small tank, and it can adapt itself perfectly in small tanks. But if you want them to feed in the big fish tanks, you can also go for that. However, keep in mind that harlequin rasbora may be attacked by the larger ones in the big fish tanks, so take care of it.  

Rasbora fish contains many details, and you need to take care of some things while feeding the fish in the aquarium. It would be best to look for the habitat, diet, and feeding of the fishes because these are the fish’s requirements. Now you must be craving to know more about this fish variety. Well here, this article will help you gain all the necessary information about harlequin rasbora. Continue reading this article so you don’t miss any of the caring or dieting tips. 

Types of Rasbora

There is a total of 10 types of rasbora fishes, which are as follows:

  • Galaxy Rasbora
  • Chili Rasbora
  • Harlequin Rasbora
  • Clown Rasbora
  • Scissortail Rasbora
  • Blackline Rasbora
  • Emerald Dwarf Rasbora
  • Lambchop Rasbora
  • Brilliant Rasbora
  • Phoenix Rasbora 

Characteristics of Harlequin Rasbora

  • The harlequin rasbora belongs to the Cyprinidae family of fishes. 
  • The origin of this fish is; Malaysia, Southeast Asia, Sumatra, Thailand.
  • Harlequin is suitable for community fish tanks as it is peaceful. 
  • The tank level should be a tip to mid-dwelling to feed the harlequin. 
  • The clown is an omnivore; hence it can have both veg and non-veg fish meals. 
  • This category may give you happiness if you want more fishes of this kind as harlequin lay eggs in regular intervals. 
  • It does not require much care and attention, and intermediate care is sufficient for harlequin. 
  • The water pH should be between 6.0 to 7.5. This is the universal pH water level for all the fishes, and a pH level more than this can affect fish’s health.
  • It can easily survive at the water temperature of 73 to 82 F ( 23 to 28 C). However, it will be difficult for a clown to survive in cold water, so you can place a water heater in the aquarium. 

Origin and Distribution

The harlequin is a native of the different countries; Singapore, Malaysia, Southern Thailand, and Sumatra. Moreover, they are mostly found in water, with low minerals and a larger amount of dissolved humic acids. This is the perfect concentration of minerals and acids, which should be present in water to feed harlequin rasbora. 

This water is usually found in swamp forests, and most of the fish pickers found this fish in these forests. Moreover, these forests have the moral decay of leaf litter, which results in peat formation, which filters out the humic acids. All of these fundamental conditions can be found in the blackwater habitats of South America. 

Color, Texture, and Markings

There are more than five dozen varieties of rasbora fishes, but the harlequin is considered one of the best. Moreover, harlequin is most popular among all the rasbora varieties. Because of its reddish-copper color, it is known as the red rasbora. Moreover, it is also accented with a striking black wedge that covers half of the body. 

These striking black wedges give this fish a stunning look and an amazing appearance. This texture is rare nowadays in the available varieties of fishes. Moreover, the diverse triangular patch on them begins from the dorsal fin and ends at the casual fan base. These patches give delightful beauty to the harlequin fish. 


The harlequins are a flexible variety of fishes they can easily adjust themselves in the fish tanks. They are the shoaling fishes and should be kept in a tank with almost eight to ten fishes. This fish requires a good crowd in the fish tank to grow properly, and if you put more than ten fishes in the tank, it can give a glorious display. 

You can keep the harlequins with any variety of fishes; they can easily adjust themselves. But if you keep them with the larger fishes, they will become their food soon. There are some of the varieties which are durable to survive with harlequin rasbora:

  • Neon tetras
  • Cardinal tetras
  • Danios
  • Dwarf gouramis

 And some other rasbora fishes can be a good companion for harlequins. Moreover, they can also adjust to the cory catfish; only a few fishes can survive with these, and harlequin is one of them.  

Harlequin Rasbora Habitat and Care

Rasbora is a variety of fishes found in the freshwater, and they are never seen in salty water. That is why they belong to the true freshwater family of fishes. Moreover, Southern Asia’s water is acidic and soft, which is perfect for harlequins. They usually prefer open areas with dense vegetation so they can easily swim under the water. 

When you keep the harlequins in the aquarium, place the live green plants for better feeding. Also, leave a good amount of space between the plants so they can swim freely in the fish tank. Cryptocoryne, these are the plant varieties that are best for harlequins in an aquarium. 

Harlequin Rasbora Diet and Feeding

The harlequin rasbora is habitual of eating all kinds of fish food in the aquarium, but they prefer live foods if possible. When they live in nature, they eat the insects presented under the water. However, they can eat the frozen stored foods and dried foods as well as flake foods. 

Moreover, if you give them a varied diet, they can digest it easily, you will not find any sign of susceptibility. The daphnia, Brine shrimp, and any other kind of worm are the best food items for the harlequins.

Read more: Best Small Pets You Can Have for Apartment Living

Final Words

Fishes are the cutest and most peaceful pets. If you love pets and do not want a dog or a cat as a pet, then you can keep the fishes in an aquarium. They are quiet and simple living organisms that will look attractive in your home.

Moreover, many people keep the aquarium with stunning fishes to make their home decor. Harlequin rasbora is one of the most beautiful fishes in the world. This variety of fish requires less attention and is flexible to all rasbora fishes and other varieties. So hurry up and get the one for your aquarium. Also leaves valuable comments if you find this article informative.