Pajama Cardinalfish

The Pajama Cardinalfish (Sphaeramia nematoptera) is a peaceful and visually unique marine fish, easily recognized by its yellow-green head, silver body, and distinctive polka-dot pattern on the rear half of its body. Its calm nature and hardiness make it an excellent choice for beginner reef aquarists.

Native to the Western Pacific, this species is typically found in sheltered lagoons and coral reef areas where it often swims in small groups.

Key Features:

• Unique spotted body pattern (“pajama” appearance)
• Peaceful and beginner-friendly marine fish
• Hardy and adaptable to aquarium life
• Best kept in groups for natural behavior

Feeding:

• Carnivorous species
• Feeds on zooplankton, brine shrimp, mysis shrimp, and frozen foods
• Accepts flakes and pellets once acclimated
• Prefers small, frequent feedings

Care Requirements:

• Minimum tank size: 100L+
• Stable reef aquarium conditions
• Provide caves, rockwork, and shaded areas
• Best kept in pairs or small groups

Compatibility:

• Fully reef safe
• Safe with corals and invertebrates
• Very peaceful and non-aggressive

Pro Tips:

• Keep in groups to reduce shyness
• Feed in the evening for best response (slightly nocturnal behavior)
• Provide dim areas for resting and security
• Avoid aggressive tank mates