Yes, that's a synbranchid eel of some type, likely the golden morph of the species called the "tulip eel" in the hobby, Monopterus albus.
Not especially difficult to keep, but as you'll quickly learn extremely aggressive and incredibly predatory. Usual practise with synbranchid eels is to put them in a tank of their own, put a lid on top, and then put a brick on top of the lid to stop the eel pushing its way out. Maximum length is 100 cm, though 40-70 cm is typical, even in the wild. Potentially dangerous to handle, so be careful. Found in both brackish and freshwater habitats; sometimes prone to fungal infections, in which case adding a small amount of marine salt mix will be helpful (5 g/l should be ample).
Cheers, Neale