.

The Mesoamerican Reef Fund (MAR Fund) is a non-profit corporation created by four environmental funds from México, Belize, Guatemala, and Honduras, as a financial mechanism for conservation and adequate resource use in the Mesoamerican Reef Ecoregion. This new conservation finance mechanism is unique in that it is the first environmental fund in the Western Hemisphere that transcends the national boundaries of four countries to encompass an entire "ecoregion".

Conservation and management of this region involves the understanding that conservation efforts should be planned and implemented beyond national boundaries.