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Predator-Prey Interactions Between the Corallivorous Snail Coralliophila abbreviata and the Carnivorous Deltoid Rock Snail Thais deltoidea

Coral reefs in the Florida Keys have become highly degraded in recent decades, prompting efforts to reestablish populations of vital reef-accreting corals to restore reef structure and ecological function. However, predation on these corals by the corallivorous gastropod Coralliophila abbreviata has been a substantial and chronic impediment to these restoration efforts. We conducted laboratory experiments to determine whether Thais deltoidea, a carnivorous gastropod that commonly occurs with C. abbreviata, is a predator of C. abbreviata. We demonstrated that T. deltoidea readily preys upon C. abbreviata and preferentially targets smaller individuals, a foraging behavior that may optimize the energy gained due to reduced handling and consumption times. If this trophic relationship proves ecologically relevant, understanding the predator-prey dynamics between these species could ultimately aid in the development of a comprehensive coral reef restoration strategy for Florida.