Apistogramma trifasciata. These are probably our most popular, blue coloured apistogrammas with 3 lateral lines.  The males are spectacular with long dorsal rays and am attitude to match.  Females are yellow and bit smaller.  
 
These fish are beautiful when fully mature and make a fantastic centerpiece for your aquarium.  They are relatively mild in nature but are not timid.  They enjoy the front of the tank.  Males enjoy showing off and erecting their long finnage. The males grow larger than the female.
 
Scientific Name: Apistogramma trifasciata
Common Names: Three-Stripe Apisto, Three-Banded Dwarf Cichlid
Origin: Paraguay, Bolivia, and northern Argentina – typically found in slow-moving creeks and flooded forest edges of the Paraguay River Basin
Adult Size: 2.5 inches (6.5 cm) for males, females smaller
Lifespan: 3–5 years
Temperament: Semi-peaceful, territorial during breeding
Swimming Zone: Bottom to mid-level