
Exclamation point rasboras are a type of freshwater fish that's native to the Mekong River basin in Southeast Asia.
They're a small schooling fish, typically growing to about 1-2 inches in length, and are a peaceful addition to a community aquarium.
Exclamation point rasboras are relatively easy to care for, requiring a well-planted tank with plenty of hiding places and a temperature range of 72-82°F.
They're omnivores, so they'll thrive on a diet of high-quality flake or pellet food supplemented with live or frozen foods.
Suggestion: Rasboras Fish
Natural Habitat and Species
The Exclamation Point Rasbora is found in the southern peninsular of Thailand, specifically in the Sai Buri, Mae Klong, and Chao Phraya River Basins.
These fish inhabit shallow water structures like marshes, swamps, ponds, rice paddies, and peat bogs, where lush aquatic vegetation creates a serene environment.
The water in their natural habitat is typically soft and acidic, sometimes tinted with a tea-like colour from tannins.
The Exclamation Point Rasbora has also been spotted in Cambodia and Vietnam, showing its adaptability beyond Thailand's borders.
A group of these fish has even made the iconic Angkor Wat temple complex near Siem Reap their home, taking up residence in its moats and ponds.
Worth a look: Rasbora Heteromorpha
Description and Care
Exclamation point rasboras are a peaceful and timid species that thrive in densely planted aquaria with floating plants and driftwood branches or roots to aid light diffusion.
They originate from the sluggish waters of southern Thailand and may struggle with swift currents, so water filtration should not be too strong.
Adult exclamation point rasboras reach a size of only 0.6 inches, making them a great choice for small tanks.
A recommended tank size is 6 gallons, and they can be kept in a single-species tank or with other miniature species like shy anabantoids.
In the wild, exclamation point rasboras are omnivores and micropredators, readily accepting most frozen and prepared foods in the aquarium.
To keep them healthy, maintain water parameters with a pH of 6.5-7.2, a temperature of 76-82F, and nitrate levels below 30ppm.
Care
Exclamation point rasboras are best suited for densely planted aquaria with floating plants and driftwood branches or roots to aid light diffusion.

Originating from the sluggish waters of southern Thailand, these fish may struggle with swift currents, so water filtration should not be too strong.
A recommended tank size for exclamation point rasboras is 6 gallons.
To create a thriving environment, maintain a pH level between 6.5 and 7.2, a temperature between 76-82F, and ensure zero ammonia and nitrite levels.
Nitrate levels should be kept below 30ppm.
Exclamation point rasboras are peaceful yet timid by nature, so they're best kept in a single-species tank or with shy anabantoids and other miniature species.
As shoaling fish, exclamation point rasboras gain confidence and provide a robust display when sustained in schools of 8-12 individuals.
Males will produce their best colors and interesting behaviors when competing for female attention.
Cherry Shrimp
Cherry shrimp are a great addition to any aquarium, and they're relatively easy to care for. They require low filtration and similar water conditions to coexist peacefully with other species.

To keep cherry shrimp happy, you'll want to set up a tank with densely packed plants and a rocky substrate. This will provide them with plenty of hiding spots and help them feel secure.
Moss is a must-have for cherry shrimp, as they need it to groom themselves. This will help keep their shells clean and healthy.
When introducing cherry shrimp to your tank, start with a small group of 2 to 5 shrimp per gallon. This will allow them to establish themselves and breed quickly, which is a good thing since they can multiply rapidly.
If this caught your attention, see: Harlequin Rasboras Tank Size
Neon Tetra
Neon tetras originate from near the Amazon River Basin.
They require similar water conditions to exclamation point rasboras, which means you can keep them together in a well-researched aquarium.
Neon tetras are schooling fish and should be kept in groups to decrease timidity and create a stunning visual effect.
In a dimly lit, densely planted aquarium, neon tetras can make a jaw-dropping display when kept with exclamation point rasboras in schools.
They need enough space to swim without becoming territorial, so make sure your aquarium is large enough to accommodate their needs.
A fresh viewpoint: Rasboras and Neon Tetras
Hardiness and Size
The exclamation point rasbora is a small fish, growing up to about 1 inch long.
Their size is one of the most distinctive features of this species.
Are Hardy?
When it comes to hardiness, some fish are better suited for community aquariums than others. Exclamation point rasboras are not the hardiest fish due to their timid nature.
Sparrow rasboras, on the other hand, can thrive in their own aquarium or alongside other small species like Sundadanio and Microdevario. These fish are more compatible with each other and create a harmonious environment.
Some fish, like pygmy Corydoras, are also suitable for community aquariums. They're small and gentle, making them a great addition to a peaceful tank.
Males of some species can become territorial during breeding, which may impact their hardiness. For example, males can become territorial during breeding in exclamation point rasboras.
Check this out: Breeding Chili Rasboras
Size
The exclamation point rasbora is a small fish, growing up to about 1 inch long. This tiny size requires special care in terms of tank size and school size.
A school of 8-12 exclamation point rasbora will thrive in a 15-gallon tank. However, bigger tanks are always better for these fish.
Male exclamation point rasboras can become territorial when breeding, so it's essential to maintain adequate space and vegetation for your school.
For your interest: Rasbora Heteromorpha Care
Tank Requirements
A 15-gallon tank is the minimum size recommended for a school of 8-12 exclamation point rasboras, but bigger is always better.
Male sparrow rasboras can become territorial when breeding, so it's essential to maintain adequate space and vegetation for your school.
To keep your exclamation point rasboras happy and healthy, aim for a tank temperature of 68-80.6°F (20-27°C), water pH of 6.0-7.0, and GH of 8-12.
Tank Capacity: 5-Gallon
A 5-gallon tank is a bit on the small side for a school of exclamation point rasbora.
In fact, keeping a school of exclamation point rasboras in a 5-gallon tank is not recommended.
If you do need to keep them in a 5-gallon tank, it's best to maintain it as a species-only aquarium.
Only 2-4 least rasboras are suitable for a 5-gallon tank at most.
Tank Setup
To create a comfortable environment for your exclamation point rasboras, you'll want to aim for a tank temperature of 68-80.6°F (20-27°C). This will provide them with the warm water they thrive in.
The water pH should be between 6.0-7.0, which is acidic enough to meet their needs. This pH range will also help to keep your rasboras healthy.
A General Hardness (GH) of 8-12 is also suitable for exclamation point rasboras. This will allow them to live comfortably in your tank.
Originating in southern Thailand, these fish require warm and soft water to survive. So, be sure to choose a location for your tank that gets plenty of heat.
Densely planted aquaria with floating plants and driftwood pieces are ideal for exclamation point rasboras. These plants will help to dissipate light and create a natural environment for your fish.
Do Need a Heater?
Exclamation point rasboras require tank temperatures between 68-80.6°F (20-27°C), so having a reliable aquarium heater is necessary.
Having a functioning heater is the only way to be prepared for colder months or for aquarists in temperate or colder climates.
Daily temperature checks with a calibrated thermometer are helpful to ensure your sparrow rasboras are comfortable daily.
Tank Mates and Compatibility
Exclamation point rasboras are most easily kept in single-species tanks or with similar-sized species that enjoy similar conditions.
They can coexist with betta fish in a well-researched aquarium, but it's essential to introduce the betta last to avoid territorial behavior.
A peaceful environment can be created by including hiding places and maintaining a pH of 5.0-6.5 with a temperature between 75-80.6°F.
To promote confidence in your fish, keep exclamation point rasboras in schools of 8-12, and consider adding a small air-powered sponge filter for aeration.
Tank Mates
When choosing tank mates for your fish, it's essential to consider their personalities and needs. The exclamation point rasbora, for example, is not usually recommended for community aquaria due to their timid nature.
They thrive in single-species tanks or with similar-sized species that enjoy similar conditions. Sundadanio, Microdevario, Eirmotus, Danionella, Trigonostigma, or pygmy Corydoras are all good options.
To promote confidence in your fish, keep least rasboras in schools of 8-12. This will help them feel more secure in their surroundings.
Betta
Betta fish can be fin-nippy and aggressive, especially when introduced to new tank mates, so introductions must be done carefully.
Adding a betta fish to the aquarium last is crucial, regardless of tank size, to prevent territorial behavior and aggression.
A pH of 5.0-6.5 and a temperature between 75-80.6°F are ideal for betta fish.
A small air-powered sponge filter may be used, but an expensive aquarium filter isn't necessary.
Breeding and Lifespan
Exclamation point rasboras can live for about 4 to 8 years with a healthy diet and suitable environment.
To breed them, separate containers with dim light and a mesh-type material should be set up to protect the eggs from the adults.
2-3 pairs of well-conditioned adults should be added to each container, and they should begin to spawn within 24 hours.
The first eggs will hatch within 24-48 hours, and the tiny fry will live on their yolk sacs for about a day before requiring Paramecium or other micro-foods.
Breeding

To breed Exclamation Point Rasboras, you'll need to set up separate breeding containers with very dim light, as they're sensitive to light. This will help reduce stress on the fish.
2-3 pairs of well-conditioned adult rasboras should be added to each container, and it's recommended to transfer them slowly to avoid increasing stress levels.
They'll begin to spawn within 24 hours if conditions are proper, and spawning will continue daily. They won't actively hunt for their own eggs, but they will eat them.
The pair(s) should be left in place for no longer than a couple of days before being taken out of the container, as the first eggs will hatch within 24-48 hours after the initial spawning.
The tiny fry will live on their yolk sacs for about a day until they require Paramecium or other micro-foods, and they should be large enough to accept microworms and brine shrimp after 7 to 10 days.
It's advised to wait 1 to 2 weeks before slowly conditioning the young with small water changes to avoid shocking them.
Lifespan

When you're considering breeding exclamation point rasboras, it's essential to know their lifespan. They can live for about 4 to 8 years.
A healthy diet and suitable environment are key to their longevity. With proper care, they can thrive in their aquarium home.
Regular tank maintenance is crucial, so be sure to check water conditions frequently and perform regular water changes and tank cleaning. This will help keep your rasboras happy and healthy for years to come.
Frequently Asked Questions
Do exclamation point rasboras need live plants?
Exclamation point rasboras thrive in aquariums with live plants, which help to create a natural environment and reduce stress on the fish. A well-planted aquarium with dense vegetation is ideal for these peaceful community fish.
How do you breed exclamation point Rasboras?
To breed Exclamation Point Rasboras, create a breeding tank with slightly acidic, dimly lit water and a mesh-covered bottom to facilitate egg passage. Add fine-leaved plants like Java moss to occupy about half the space.
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