Leatherback sea turtles are predators that eat mainly jellyfish and other soft-bodied marine animals. Their affect on prey population densities is unknown, but might have been substantial before their populations were reduced by harvesting.
Leatherback eggs and hatchlings may be a significant food source for egg predator populations near their nesting beaches.
Leatherbacks are the host of Conchoderma virgatum, a commensal species of barnacle.
- Eckert, K., S. Eckert. 1987. Growth Rate and Reproductive Condition of the Barnacle Conchoderma virgatum. Journal of Crustacean Biology, Vol. 7/No. 4.: 682-690.