The whiptail conger (Rhynchoconger gracilior), also known as the conger eel in Cuba,[3] is an eel in the family Congridae (conger/garden eels).

[4] It was described by Isaac Ginsburg in 1951, originally under the genus Congrina.

[5] It is a marine, deep water-dwelling eel which is known from the western Atlantic Ocean, including the United States in the northern Gulf of Mexico and northern South America.

It is known to dwell at a depth of 203 meters (666 ft).

Males can reach a maximum total length of 61 centimeters (24 in).