Pajama Cardinalfish



The pajama cardinalfish very ornamental fish with the most vibrant of colors. Its face is greenish-yellow with bright, orange eyes, an elegant body that has an imposing black vertical bar, and a rear that is dotted with orange polka-dot marks. The Pajama Cardinalfish employs this cryptic coloration to alter its body shape, allowing the Pajama Cardinalfish to "hide in the open" when they gather in a group or tucked away in sea grass or other plants or even among long-spined sea urchins. The Pajama Cardinalfish has a peaceful nature that allows it to seamlessly blend into any saltwater aquarium that is a part of the community. To ensure the highest level of treatment, the Pajama Cardfish is best kept in small, well-established aquariums that are minimum 30 Gallons. Since it is such a slow, methodical swimmer, it needs to be kept with calm tankmates and provided with plenty of hiding spots between rocks or in plants. As with other schooling fish, Pajama Cardinalfish establish a strict hierarchy when being kept as small groups in the aquarium. But, unlike other group fish that socialize, this one belonging to the Apogonidae family is not using violence to dominate other cardinalfish. These marine fishes must receive a diverse diet made up of food items specifically designed for carnivores. If it is kept in a tank that is reef-based, the Pajama Cardfish needs to be fed every day. Approximate Purchase Size: Small: 3/4" to 1-1/4" Medium: 1-1/4" to 2-1/4"  
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General information about Pajamas Cardinalfish The Pajama Cardinalfish is a rainbow of vibrant shades. It features a yellowish-green face and bright orange eyes and a body that is silver-based, with a striking black scalar edge and an anterior dotted with orange polka dots. Although its striking coloration might make it stand out, Sphaeramia nematoptera has a tranquil nature that allows it to seamlessly blend into any saltwater aquarium. This aquarium fish ought to be housed in tiny groups in medium to large aquariums. Since the Pajama is a slow, methodical swimmer, it must be kept in a peaceful tank with other fish and given a myriad of hiding spots among the rocks or other plants. The majority of Pajama Cardinalfish will tend to conceal themselves within seagrass or in other plants. They may also hide against sea urchins with long spines. Similar to other schooling fish Pajama Cardinalfish create a strict hierarchy if kept in small groups within the aquarium. But, unlike other group fish that are social, this one belonging to the Apogonidae family is not using aggressiveness to gain the upper hand over other cardinalfish.
Large, Medium, Small
6 lbs


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Helpful Questions From Clients
Frequently Asked Questions
Is hiring a professional necessary to set up a saltwater aquarium?

As a general rule, a larger custom aquarium might require installation by a professional. However, a kit from our online fish store is relatively affordable and beginner friendly. That means you should have no problem setting it up yourself.

Which saltwater aquarium fish should you choose when starting out?

Consider a yellow tang fish. This popular saltwater aquarium fish does a great job of coexisting with other types of fish you’ll find in our online fish store.

How does a saltwater aquarium differ from a freshwater one?

Saltwater aquariums require a bit more maintenance and monitoring than freshwater tanks. Different fish require different levels of salinity, pH tolerances, and temperature requirements. They also require specialized pumps, filters, and other equipment that can handle salt. We can guide you through everything you need to know to set up a healthy, thriving reef tank.

Do fish in a saltwater aquarium swim in a school?

That depends on the species. However, if it’s a fish that swims in a school in the wild, they’ll do the same in an aquarium. Some fish that swim in schools include the green and blue chromis, cardinalfish, and dartfish, for example. When ordering from an online fish store, make sure you do your research on how specific fish species behave to ensure they’ll school (or at least coexist) with your current fish.

Is the effort required to maintain a saltwater aquarium worth it?

Yes! Many aquarists dream of owning thriving saltwater aquariums. You have a tiny piece of the ocean in your home, featuring magical and exotic fish that can only survive in saltwater.