Pajama Cardinalfish, also known as the Spotted Cardinalfish, Coral Cardinalfish, or Polkadot Cardinalfish, is a marine fish from the Apogonidae family.
It lives mainly in the western Pacific Ocean from Java to Fiji and from the Ryukyu Islands to the Great Barrier Reef.
Pajama Cardinalfish are peaceful by nature and fit well in community saltwater aquariums.
They form strict social ranks when in small groups but don’t use aggression for dominance, unlike some other social fish species.
These fish gather among Porites nigrescens and P. cylindrica coral branches in protected bays and lagoons during the daytime while feeding close to the ocean floor at night.
These fish have been bred successfully in captivity and are popular choices for aquariums due to their striking appearance and peaceful behavior.
They generally coexist safely with other reef creatures but may pose risks to smaller shrimp species living within an aquarium environment.
Pajama Cardinalfish Interesting Facts
- Pajama Cardinalfish, found in the Indo-Pacific region, have vivid colors and peaceful nature, making them popular aquarium choices.
- These fish form strict social ranks without aggression and coexist safely with other reef creatures.
- They grow up to 3.35 inches (8.5 centimeters) long and are mouthbrooders, carrying eggs during mating and egg-laying.
- These fish live near reefs at depths of 1 to 14 meters in tropical waters across a wide range of latitudes and longitudes.
Pajama Cardinalfish Habitat
Pajama Cardinalfish is found in the Indo-Pacific region, from Java to Fiji, and from the Ryukyu Islands down to the Great Barrier Reef. It has also been seen in Tonga.
This fish lives in marine environments near reefs and is found at depths of 1 to 14 meters (3 to 46 feet) in tropical waters with latitudes ranging from 31°N to 23°S and longitudes between 94°E to 175°W.
Pajama Cardinalfish Physical Characteristics
Size: 3.35 inches (8.5 centimeters)
Pajama Cardinalfish is a small fish. It grows up to 3.35 inches (8.5 centimeters) long.
This fish has 7 to 8 dorsal spines, 9 dorsal soft rays, 2 anal spines, and 9 to 10 anal soft rays.
Its appearance includes a yellow head, a red band through its eye, and a dark brown bar on its front body that continues onto the first dorsal fin.
The pelvic fins are also dark brown. The back part of the body has purple spots, and the tip of the second dorsal fin is longer than usual.
The body’s depth is about 1.8 to 2 times its length.
Pajama Cardinalfish Reproduction
Pajama Cardinalfish are mouthbrooders, which means they carry their eggs in their mouths.
During mating and egg-laying, these fish show clear pairing behavior.