Moray eels are legendary predators on coral reefs. Note the second set of jaws in the “throat”; these are the gill arches, which are present in all fish. Gill arches support the gills, the major respiratory organ of fish.
X-ray Vision: Viper Moray
Credit: radiograph and fish photograph by Sandra J. Raredon, Division of Fishes, National Museum of Natural History, Smithsonian Institution.