Scientific Name:
Sphaeramia nematoptera
Other Common Names for the Pajama Cardinalfish:
Spotted Cardinalfish - Polka Dot Cardinalfish


The Pajama Cardinalfish is found in the Western Pacific Ocean, from Java to Fiji, and from the Ryukyu Islands to the Great Barrier Reef. This multi-patterned cardinalfish is a member of the Apogonidae family. They have a greenish-yellow face with giant orangish-red eyes. Their body is shimmery silver dressed with a black waistband, followed by a posterior covered with orangish-brown polka-dots.  A Pajama Cardinalfish can reach up to 3 inches in length and requires an aquarium of at least 30 gallons with plenty of room to swim.


Pajama Cardinalfish are carnivorous. Their diet should be varied and consist of things like frozen brine shrimp, Mysis shrimp, pellets, and flake food, and/or prepared or frozen offerings.


As stated earlier, a Pajama Cardinalfish can reach up to 3 inches and requires an aquarium of at least 30 gallons. They can be a bit shy when you first add them to your tank, but will come after a couple of days. They appreciate the crevices and caves in your rockwork to use as a hiding place. As they get comfortable, they will swim out in the open. Pajama Cardinalfish are generally peaceful and may be kept with other peaceful fish. You may consider getting multiple Pajama Cardinalfish, as they are happier in small schools. Like many other schooling fish, these fish will form a strict hierarchy when kept in small groups within the aquarium. However, there isn’t much aggression between the members of the group. If you intend to keep fish, a netted lid is recommended.


Leave a comment

Your title

Write or copy/paste HTML code