Until recently, the species on this page were considered to belong to a single family, Ranellidae. Recent examination of molecular data has split Ranellidae into a number of separate families, including three that are represented at Kwajalein. Most species live in rocky or coral habitats throughout the atoll and they all appear to be carnivores, with different species feeding on starfish, bivalves, gastropods, egg masses, and probably other prey.
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