
Clownfish, damselfish, and cardinalfish
Pajama Cardinalfish
Sphaeramia nematoptera
Photo: NasserHalaweh · CC BY-SA 4.0 · Wikimedia Commons
Key facts
- Temperature24–27 °C
- pH8.1–8.4
- Minimum tank120 l
- Adult size8 cm
- Difficulty★☆☆☆☆
- Lives in a groupof 3 or more
- TemperamentPeaceful
- WaterMarine
- Reef safeYes
Full profile
- Family
- Apogonidae
- Origin
- Western Pacific (Indonesia to Fiji)
- Size
- 8 cm
- Temperature
- 24 – 27°C
- pH
- 8.1 – 8.4
- Salinity
- 1.023 – 1.025
- Difficulty
- ★☆☆☆☆
- Water type
- marine
- Swimming level
- medium
- Behavior
- Pacific
- Minimum number of individuals
- 3
- Minimum aquarium size
- 120 L
- Diet
- carnivore
- Reproduction
- oviparous; paternal mouthbrooding
- Reef Safe
- ✅ Yes
Notes: Yellow head, dark band down the center, and a red-speckled rear, like pajamas. Nocturnal but visible during the day. Very peaceful in groups.





