Red Eye Tetras, scientifically known as <i>Moenkhausia sanctaefilomenae</i, are a popular freshwater aquarium fish known for their striking appearance and peaceful temperament. They feature bright red eyes, a silver body, and a bold black vertical bar at the base of their tail. These tetras are relatively easy to care for, making them a good choice for beginners, and they thrive in community tanks with other peaceful species.