The Threadtail conger (Uroconger syringinus, also known as the Slender-tail conger) is an eel in the family Congridae (conger/garden eels). It was described by Isaac Ginsburg in 1954. It is a marine, subtropical eel which is known from the eastern and western Atlantic Ocean, including the Gulf of Guinea, the Gulf of Mexico and Suriname. It is known to dwell at a depth range of 44 to 384 metres (144 to 1,260 ft). Males can reach a maximum total length of 38 centimetres (15 in).