Congo Tetra Identification Guide

Key identification features

• Large, deep-bodied tetra, noticeably bigger than most common tetras at 3-3.5 inches (7.5-9 cm)
• Body shimmers with iridescent blue, gold, and violet tones that shift with the light
• Broad, dark horizontal band running along the mid-body from gill to tail
• Males develop an elongated, flowing, veil-like extension on the center of the tail fin
• Dorsal and anal fins are elongated and edged in white or pale coloring, especially in males
• Females are smaller, less iridescent, and lack the extended tail filament

Common look-alikes

• African Red-eyed Tetra is smaller with a more compact body and plain silver coloring, lacking the Congo Tetra's strong iridescence and tail extension.
• Emperor Tetra has a similar deep body shape but shows a black horizontal band and yellow-orange fins rather than blue-gold iridescence.
• Diamond Tetra shares an iridescent sheen but is smaller and lacks the male's characteristic trailing tail filament.

Where you'll see one

Native to the Congo River basin in Central Africa, where it inhabits slow-moving, slightly turbid tributaries and forest streams, typically schooling in mid-water over sandy or leaf-littered bottoms.