The Chatham mudfish (Neochanna rekohua), formerly known as the Chathams galaxias (Galaxias rekohua), is a galaxiid fish endemic to two small, peaty lakes in southern Chatham Island, New Zealand.

Mitchell, who initially placed it in the genus Galaxias, and gave it the species name rekohua after the Moriori word for the Chatham Islands.

McDowall reassigned it to Neochanna based on its external anatomy, behaviour, and skeleton,[3] and this was subsequently supported by a genetic analysis.

It only lives on the edges of a few peaty lakes amongst submerged wood, so is naturally uncommon, but abundant in the few spots where it occurs.

[5] As of 2014, the IUCN indicated that the Chatham mudfish was a least-concern species.