Pajama Cardinalfish - Sphaeramia nematoptera
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The Pajama Cardinalfish (Sphaeramia nematoptera) is a peaceful and visually striking reef fish, recognized for its unique coloration featuring a spotted midsection and bold red fins. Hardy and easy to care for, it adds calm activity and charm to marine aquariums.
Common Name: Pajama Cardinalfish
Scientific Name: Sphaeramia nematoptera
Family: Apogonidae
Size: Up to 3 inches (7.5 cm)
Temperament: Peaceful
Difficulty: Easy
Reef Safe: Yes
Native Region: Found throughout the Indo-Pacific, including Indonesia and the Philippines, typically inhabiting sheltered lagoons and reef crevices.
Tank Size: Minimum of 20 gallons
Temperature: 72–78°F (22–26°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Live rock with crevices and hiding spots; provide open swimming areas.
• Schooling: Best kept in groups of 4 or more to encourage natural behavior.
• Diet: Omnivorous—accepts flakes, pellets, and frozen foods such as brine shrimp and mysis.
• Behavior: Peaceful and calm; often hovers near rockwork and corals.
• Tankmates: Compatible with other peaceful reef fish; avoid aggressive species that may stress the fish.