Cyprinodon brontotheroides is a species of fish in the Cyprinodon genus. It is endemic to hypersaline interior lakes on San Salvador Island, Bahamas. It coexists alongside two other closely related Cyprinodon species C. desquamator and C. variegatus. Together, these three species represent a recent adaptive radiation, each having moved into a difference niche within their specialized environment. Each of these species are defined by distinct trophic adaptations that have affected various aspects of functional morphology.