The largest known moray eel is the Slender giant moray, which can reach 4 metres in length.

In terms of body mass, it is the largest moray eel (the slender giant moray is longer).

The slender giant moray or gangetic moray, Strophidon sathete, is the longest member of the family of moray eels.

The slender giant moray is found in the Indo-West Pacific Ocean from the Red Sea and East Africa to the western Pacific.