Anthropogenic disturbances affect the health of coral reefs worldwide and may also impact hawksbill ( Eretmochelys imbricata ) foraging areas, potentially decreasing sponge numbers, while increasing macroalgae. Few studies have been conducted to understand energy content of hawksbill prey. We investigated observed ( Geodia neptuni and Kallymenia limminghii ) and potential ( Xestospongia muta and Halimeda opuntia ) hawksbill pr...