The Collaborative International Dictionary of English v.0.48:
Congo snake \Con"go snake"\ (Zool.) An amphibian (Amphiuma means) of the order Urodela, found in the southern United States. See Amphiuma. [1913 Webster] CongouWordNet (r) 3.0 (2006):
congo snake n 1: aquatic eel-shaped salamander having two pairs of very small feet; of still muddy waters in the southern United States [syn: amphiuma, congo snake, congo eel, blind eel]