What are guanabana ,camu-camu,and chirimoya?

Guanabana, camu-camu, and chirimoya are tropical fruits native to South America. Guanabana is a large, green fruit with a sweet, custard-like flavor. Camu-camu is a small, red berry with a tart flavor. Chirimoya is a heart-shaped fruit with a creamy, sweet flavor.