Shoaling fish abreere extremely popular for home aquariums due to their fun collection behaviors and striking colours. Harlequin Rasboras are a wonderful example of an simple shoaling fish to improve your tank.

They’re a striking fish that, when inserted as a member of a set, will include a vibrant splash of colour to a tank.

This attractive little fish has very few special care requirements and they are not very demanding. They are simple to look after, and so long as they are fed a very simple diet, and also their tank is kept tidy, they will thrive. The ideal match for a novice.



These small shoaling fish are simple to take care of, which means you should not have many issues. They are sometimes cared for by people of expertise levels.

This makes them ideal for beginners beginning a community aquarium.

You won’t fight to locate harlequins; they are generally in high demand so many aquarium shops will stock them. You need to expect to pay $2-4 each fish.

Average Behavior

They’re calm animals; they won’t irritate some of the tank mates. If anything, they’re more inclined to be the sufferers and will become worried by boisterous fish.

The majority of their time is going to be spent at the middle layers of the water, infrequently journeying into the surface or substrate. You may see them hiding one of the plants or in temples, this might be because they are worried and trying to escape from other fish or glowing lights.

Whenever you’ve got a group, you are going to notice some shoaling behaviors. The harlequins will proceed around together, occasionally displaying some fascinating behaviors. On their own they’re rather shy, but if they form a part of a groupthey are alive and you will notice they’re much more happy and content.

The bigger the group, the more striking their moves and colours will be.


Harlequin Rasbora Appearance

All these rasboras seldom grow larger than two inches. Since they are little you can easily match quite a few in 1 tank.

The back half of the body includes a dark spot which narrows with the human body and stops in the back fin.

This black patch is the thing that gives this fish it is name, being like the black patterns located on a traditional harlequin outfit.

This depends upon a lot of factors like the states of the tank, anxiety levels of their fish and the people that they have been bred from.

When these designs are not striking in their own, a set may produce a spectacle. This is precisely the same for other fish also, such as neon tetras.

Spotting the difference between females and males can be hard. Men often have slightly bigger black spots and a more curved section in which the anal fin attaches.

Habitat and Tank Conditions

Habitat and Tank Conditions

Though circumstances will differ between those habitats, there are a couple of things that are continuous.

The waters in those regions are tropical therefore temperatures will probably be rather warm and the pH will probably be close neutral (those fish will not survive in extreme acidity or alkalinity).

Planted from the substrate could be plants surrounded by stones and debris.

Water flow is generally quite slow.

Tank Setup

Harlequins bred for aquariums have been grown in environments according to their own river habitats, therefore this really is actually the habitat that you want to recreate on your tank.

Begin with a gentle sandy substrate at the base of the tank. You can use gravel rather; this decision isn’t so significant since they will seldom stray down to the base of the tank.

Put some crops around the tank to allow them to conceal, however leave a lot of open swimming places to allow them to shoal and float around in. Any decorations or stone you include will be only aesthetical for all these fish; they will spend the majority of their time in open water.

You do not require any specialist equipment; the filter socket produces a powerful enough current and many commonly marketed aquarium lights are appropriate. You simply have to bring a heater.

Place your heater involving 72-81°F.

Any bigger and there might not be adequate room to shoal so that you’d need to maintain them in pairs or independently.

Just how Many Can Be Held Per Gallon?

Aim for about two per gallon. The bigger the tank, the more you may get, and the more striking a shoal’s screen will be.

Harlequin Rasbora Tank Mates

Harlequin rasboras are calm fish and will remain from everybody else’s way. This usually means that you’re free to select other comparable fish to maintain as tank mates.

You need to avoid most species which are bigger than twice the harlequin’s dimensions since they’ll likely see them as a bite. Cichlids are most likely to try it, particularly the bigger ones.

Boisterous fish could be a issue too. This species is very timid so can become worried when they are chased by overactive fish. Clown Loaches and Bettas are a few species which may irritate others.

Little tranquil fish are perfect. You’re able to keep snails and fish with harlequin; they are not likely to observe each other.

It’s possible to keep harlequins together; actually you need to keep them in groups of four. They are a shoaling species thus do nicely in the business of their own kind.

The bigger the group, the greater their screens will be. Just keep a sum that could comfortably fit on your tank though, approximately two per gallon at at least a 10 gallon tank.

Things To Feed Them

Harlequin Rasbora

As omnivores, these fish will consume a broad selection of foods. The major thing to look out for is that the size of the meals. Harlequin rasboras have little mouths, so they will only have the ability to consume modest particles.

From the wild this implies they are limited to foods such as plant detritus, little insect larvae and eggs. Their omnivorous diet signifies they’re opportunistic; they consume whatever comes in their way.

The simplest approach to cater to their needs in an aquarium is by way of foods that are salty. At feeding times that they will get busy and thankfully choose flakes or pellets out of the surface. These are especially designed to include a variety of nutrients.

It is always best to change their diet, or even for nutritional supplements, then simply to keep it interesting for them.

This is sometimes carried out with frozen or live foods. Live foods particularly make feeding times intriguing by introducing motion.

Despite the fact that they can eat crops, it is unlikely so that you do not need to be concerned about harm. This does mean that you can feed these green vegetables however, or perhaps use these to create your own homemade fish meals.

Feed them twice per day, simply giving them exactly what they could complete in a few minutes. This is easier in their digestive tract, than giving them in 1 go.

Remove any extra food in the tank after ingestion time to reduce corrosion.

How to Care for Harlequin Rasboras

Harlequins are hardy fish, so that they do not get sick very often. With appropriate care you are not likely to encounter any issues.

The most frequent ailments affecting these are problems for several other aquarium fish also.

These ailments, in addition to many others, flourish in poor excellent water. A filthy tank is among the top causes of illness outbreaks.

After cleaning the tank, you may see an improvement on your own fish. Otherwise, you will find remedies you can get to help remove this illness.

Another element that increases the chances of illness is poor nourishment. If a fish is not getting all of the nutrients they require in their diet, they’ll be too feeble to fight off disease.

Ensure that your harlequins have a varied diet comprising the meals we mentioned previously. This ought to offer your fish what they will need to keep strong.

Should you keep them healthy, then they could live for 5-8 decades.

Breeding Harlequin Rasboras

Breeding Harlequin Rasboras

Regrettably they’re among the more difficult species to breed in an aquarium, but it’s possible. They have to be kept healthy and also the conditions from the tank have to match what they would be used to in the wild.

A slightly warmer temperatures (approximately 80°F) helps encourage spawning. Your fish will require supplements full of nourishment also; daphnia and bloodworms are great choices.

Maintain two females for each male. These men will carry out a screen to lure the female to mate.

You are going to want a few broad-leaved plants (for example, Anubias Nana) on your tank since after prepared to spawn, the female squeezes her belly on the bottom of a leaf to indicate the man. These can be connected to the foliage and inhale after 24 hours or so.

Separate the parents out of the fry as they will attempt to eat them. The fry will be almost totally clear and feed a yolk sac for another 24 hours.

Next, you’ll need to begin feeding them. Recently hatched brine shrimp are among the few foods little enough to provide them. A poor diet may impact growth.

Harlequin Rasbora For Your Aquarium

Harlequin Rasbora in Aquarium

These fish are calm tank mates, therefore that they do well in many tanks.

A little arrangement of crops is all you have to keep those fish joyful.

If you are seeking to breed them then they’ll need a great deal more focus. Requirements have to be great or they won’t begin to spawn.

Insert these fish into your tank and you’ll be rewarded with exceptional shoaling behaviors and powerful colours. The more you are able to match in the tank, the more remarkable these screens will be. A massive set could compete with some of the very attractive fish at the aquarium market.

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