The Congo tetra has a typical full-bodied tetra shape with rather large scales. When mature, the iridescent colors of the Congo tetra run through the fish from front to back, starting with blue on top changing to red through the middle, to yellow-gold, and back to blue just above the belly. It is not its fluorescent colors that make this tetra so distinct, but rather its tail fin, which develops into a most beautiful grayish-violet feathery appendage with white edges. 
Species – Congo Tetra – Phenacogrammus Interruptus
Current Size – 2cm – 3cm
Adult Length – 6-8cm
Temperature Range – 23 – 28 °C
pH Range – 6.0 – 7.5
Tanks Mates and Compatibility -  Peaceful but may scare shy species with its active swimming and large adult size. Recommended for most community tanks however. Ideal tankmates include other tetras, rainbowfish, Corydoras, Loricariids, Synodontis and various peaceful cichlids such as Pelvicachromis sp. or Cleithracara. Do not keep congo tetras with fin-nipping species as the spectacular fins of the males will be destroyed. Similarly, they should not be kept with boisterous tankmates due to their shy nature.