Koreocobitis rotundicaudata is a Cobitidae from Korean Peninsula. Half of its life happens after dark; give it fine sand and it will reward you with natural foraging. It lives on the bottom. Adults reach 12.8–18.7 cm. Loose groups of 5+; loneliness makes them shy. Use a soft sand bed and feed sinking foods; coarse gravel wears down its sensory barbels. Maintain 18–26 °C at pH 6.5–7.5. Water quality and diet matter more than décor.