The Gran Caldera de Luba Scientific Reserve (Spanish: Reserva Científica de la Gran Caldera de Luba) is a protected area of 51,000 hectares (130,000 acres) on the volcanic island of Bioko (formerly called Fernando Pó), a part of Equatorial Guinea. The dense rainforest is rich in plant and animal species including a high population of primates, some endemic to the reserve.Much of the reserve consists of pristine forest.However, the primate population is under threat due to growing demand for bushmeat coupled with lack of enforcement of the ban on hunting in the reserve.