Also known as graviola, soursop is a large prickly, heart shaped green coloured fruit growing in tropical regions such as Nigeria.

It is covered with ridges on the outside and has a soft juicy flesh inside. As it ripens, it becomes slightly soft and light green externally. As seemingly dangerous as this fruit appears, it helps keep you healthy in these ways:
https://doksblog.com/wonders-of-soursop-fruit-health-benefits-of-soursop/