The Family Amphiumidae consists of elongated, eel-like salamanders commonly known as amphiumas, native to the southeastern United States. They are fully aquatic, inhabiting slow-moving or stagnant waters such as swamps, bayous, and ponds. Amphiumas have very small, vestigial limbs—one pair in some species, two in others—making them appear almost limbless. They are nocturnal predators, feeding on fish, insects, and other small aquatic animals. Amphiumidae exhibit internal fertilization, and females lay eggs in moist terrestrial sites near water. These salamanders are notable for their large size, ability to survive in low-oxygen environments, and remarkable longevity, sometimes exceeding 20 years in the wild.