Black Emperor Tetra

Color: The Black Emperor Tetra exhibits a satin black body color with a cream-colored snout and vibrant blue or green eyes. 
Males: Adult males have dramatically elongated dorsal and caudal fins, including an extended middle ray that creates a "trident" tail. 
Females: Females are generally smaller and have thicker bodies compared to males. 
Overall Size: They grow to about 3 inches in length. 
Behavior and Keeping:
Social:
They are peaceful and shoaling fish, meaning they thrive in groups of at least 6 to 10 fish. 
Territory:
Males may engage in displays and competition for females, but this isn't usually a problem in larger aquariums with ample space and decorations. 
Aquarium Placement:
They are mid-water level dwellers, but can be seen in other areas of the aquarium. 
Compatibility:
They are safe to keep with other peaceful, small fish. 
Tank Conditions:
Tank Size:
Minimum of 10 gallons, but 20 gallons or larger is recommended for larger schools. 
Water Parameters:
They prefer soft and acidic water, with a pH between 6.0 and 7.0 and a general hardness of <12 degrees. 
Temperature:
Maintain temperatures at the higher end of their preferred range (72-82°F). 
Breeding:
Breeding Habits:
Black Emperor Tetras typically breed in pairs and can be bred in a heavily planted aquarium. 
Fry:
The parents may consume the eggs, so it's often recommended to move the adults after spawning or set up a separate breeding tank. 
Feeding:
They eat flake, micropellets, small frozen foods such as daphnia, brineshrimp and mosquito larvae.