The Pajama Cardinal Fish


A pair in a nano and a shoal in a larger aquarium of these fish can simply look amazing. These fish are not necessarily the brightest or the biggest but they can be an amazing addition to a communal aquarium. Cardinals are generally considered peaceful and placid within an aquarium. The most common two types of cardinals that are found within the hobby are the Pajama and the Banggai. They truly are a great addition to any saltwater aquarium.


Lets learn a little more….



I have always seen this bright critter in most of the LFS I have been in and they always catch my eye. A shoal of these fish in a reef tank would look amazing. They are a great choice for the beginner. They aren’t badly priced and are considered a hardy species.



Tank Size

30 gallons is recommended. Although keeping a pair in a nano aquarium seems to be the norm. I suggest as long as you don’t over populate the aquarium and there is enough swimming space a smaller tank will be just fine.

These guys do well in a communal tank or a nano aquarium.

They form amazing shoals in a large aquarium if you have the water volume for them.


Care Level

Easy – ideal for beginners. As long as all your parameters are stable you should have no issues with them.



Peaceful – I have never heard of these fish causing any issues within a communal reef tank.


Reef safe

Yes. I think almost every time I have seen these fish it has been in a reef tank.


Max Size

3.5 inches.



Pajama Cardinals are a very bright and colorful fish. They have a range of markings across their body. As a shoal these colors blend and contrast as they swim. I have only once ever seen a large shoal of this fish in an aquarium and it looked amazing. It easily rivaled the beauty of a larger fish such as an angel.



Carnivorous – Frozen foods and pellets seem to work well with these fish. But they will eat a wide range of fleshy foods.



I personally have no experience or have head of anyone breeding these fish in their home aquarium. Their breeding process is very similar to that of the Banggai. click here to see how they breed!