he red eye tetra (Moenkhausia sanctaefilomenae), also known as the yellow-banded moenkhausia, the yellow back moenkhausia and theyellowhead tetra is a species of tetra. It is a freshwater fish, can grow up to 7 cm, and can live for approximately 5 years. The Red-eye tetra has a bright silver body accented by a black tail and a thin red circle around its eye. It is found in South America, in Paraguay, eastern Bolivia, eastern Peru, and western Brazil; aquarium fish for the hobby are now bred extensively in Asia
The red eye tetra's hardiness and ease of care makes it an excellent beginner fish. This fish is readily available, peaceful, and is suitable for most community aquariums.