Chili Rasbora: Lifespan, Behavior, Care, & Breeding

Chili Rasboras (Boraras Brigittae), sometimes also known as Mosquito Rasboras are a group of stunning and dazzling nano fishes, originating from Indonesian dark-water streams. These little fellas are such a unique and beautiful group, they’re fairly tiny but quite fascinating & active and will be great for your nano collection. When it comes to small fish, they’re favorites of many and pretty popular in many small aquariums. They’re very much attractive, affordable and easy to take care of, so let’s have a closer look at them.

Chili Rasbora Lifespan & Size

Chili Rasbora is a pretty tiny nano fish. They might surprise you when you first order them, but it’s quite a fun experience to witness their size for the first time. They’re usually about 3/4 of an inch in size (2cm)with males being a little bit thinner than females. Their lifespan is somewhere between 4-8 years.


Chili Rasboras have got some unique features about them. As mentioned earlier they are quite small but don’t let this trick you – they are usually not shy at all! You can expect them to be pretty social and outgoing and they won’t hold back unless there are some bigger fishes to disrupt them so as long as you keep them in a group of other small fish, they will have a great time.

Dazzling Red

Perhaps the most unique feature about Boraras Brigittae is their colorful appearance. They are very bright in color – you will notice a very intense red fish with black stripes all over their body. The best way to make them display their true colors is to keep them in groups of 10 & up; this will make them more natural looking as males will be competing for female attention in larger groups thus will attempt to stand out by intensifying their color.

As said earlier, they’re schooling species which means they love to stick together, so make sure to get plenty of these for your aquarium. When it comes to their environment, they will get along with other small and peaceful species but will struggle if in the same tank with larger fish. They will get along with other diminutive species such as:

  • Microdevario
  • Sundadanio
  • Danionella
  • Eitmotus
  • Trigonostigma
  • Other diminutive betta spices (freshwater shrimp)

If you’re looking for a great & colorful community in your nano aquarium, be sure to add chili raspboras in to the mix – you will not regret it!


When it comes to their diet, these little devils are quite versatile, and you can be pretty flexible with your choice of food. They’re comfortable eating live food, frozen food, and even dried food, so that’s a lot of options for you. You usually want to feed them other small fish, 2-3 times a day. They’re micropredators, so they love to hunt other living creatures – make sure you give them a chance to show off their skills.

Here’s some foods you can use to feed your Chili Rasboras:

  • Micropelets
  • White Worms / Microworms
  • Water fleas
  • Brine Shrimp
  • Frozen foods (Daphnia, Artemia)

You may experiment with other small foods but this should be enough as a start.

Chili Rasbora Care & Housing

As they’re quite tiny, you want to keep them strictly for your nano aquariums. Your aquarium should be around 10 gallons (40 liters) in size. Give them plenty of other peaceful, and you will have an excellent community for your viewing pleasure. For the best possible outcome, we have a few suggestions for your aquarium, so let’s take a look at them:

As for decorations, since they come from dark water streams make sure to give them a little bit darker lightning – you can have a spotlight with a little bit more light though. Make sure you have lots of plants (leaf litter, driftwood, etc.) and you should have a pretty great looking aquarium. You may decorate it as you wish, but we would suggest keeping it as rich & dense as possible!

Okay, let’s talk a bit about technical aspects of your aquarium. First off, you should keep your filtration at a minimal rate since strong & direct filtration bothers them because of their small size and sluggish swimming. When it comes to temperature, keep it around 75-85°F (25-30 °C) with pH levels of 5-7. As for the lightning, try to keep it low and defused to stimulate their natural environment as much as possible.

Chili Rasbora Breeding

Like many other small fish species, Chili Rasboras are egg-scattering species who continuously spawn their eggs. They don’t display any signs of parental care and will leave their eggs on their own. In the presence of healthy amounts of male & females, you can look forward to a couple of eggs on a daily basis. You can also expect this species to eat it’s own eggs although they will not usually be motivated to do so. Because of this, you might want to intervene if you’re looking to increase your numbers in the aquarium. You can certainly try to remove newfound eggs from the existing aquarium and allow newly hatched fry to mature before putting them back in the old tank.

As is the case in many other aquarium environments – you can expect the larger, alpha males to be the dominant ones in the tank, chasing the smaller fish away and actively hunting for females. These males will display unique, intense red & black color and will fight for their piece of the territory.


Overall, the Chili Rasbora are such fun and unique fish species to have in your small aquarium, and you want them to be a part of the community. They will add a beautiful red color to your tank, and it’ll be a pleasure to watch them compete daily. They’re easy to take care off, so there’s no need to hold back – get these beautiful creatures – right now!