The common false moray, false moray, grey reef eel, or plain false moray,[1] (Kaupichthys diodontus), is an eel in the family Chlopsidae.

[3] It is a tropical, marine eel which is known from seaward reefs in the Indo-Pacific regions.

It typically dwells at a depth around 56 metres (184 ft).

Males can reach a maximum total length of 30 centimetres (12 in).

[2] Due to their similarities, Kaupichthys diodontus is sometimes considered synonymous with K. hyoproroides (more commonly known as the false moray), but some authors list them as distinct species.