雷恩东澳鳗又称宽鳍鳗鲡，俗称土龙。

雷恩东澳鳗体型十分巨大，一般成年雷恩东澳鳗的体长就可达40至100公分，目前体型最大的雷恩东澳鳗体长可达200公分，重18公斤，足足比鲈鳗（Anguilla marmorata）的160公分大了40公分，更是比日本鳗鲡（Anguilla japonica）的140公分大了60公分。

雷恩东澳鳗身体短胖，外观与鲈鳗极为相似，跟鲈鳗相同，雷恩东澳鳗也有淡色班云，但雷恩东澳鳗的体色偏绿或偏蓝紫色，与鲈鳗最大不同的特征为背鳍的起点，雷恩东澳鳗的背鳍是从背部中间后原点为起点，而非鲈鳗的腮裂至肛门中间的前缘。

The speckled longfin eel, Australian long-finned eel or marbled eel (Anguilla reinhardtii) is one of 15 species of eel in the family Anguillidae. It has a long snake-like cylindrical body with its dorsal, tail and anal fins joined to form one long fin. It usually has a brownish green or olive green back and sides with small darker spots or blotches all over its body. Its underside is paler. It has a small gill opening on each side of its wide head, with thick lips. It is Australia's largest freshwater eel, and the female usually grows much larger than the male. It is also known as the spotted eel.