Artisanal fishermen from the island of Guanaja in the Caribbean coast of Honduras, are known for targeting species associated with the upper mesophotic coral reef ecosystems that lie between 30 and 150 m deep. Through this project I aim to assess biomass composition of this deep ecosystem employing a submersible drone. The results will be applied to construct a trophic model which will be used to guide the development of local fishery management strategies.