From Japanese-German FreeDict Dictionary ver. 0.2.0:
[ichi1] [news2] [nf30] 鯉 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] [news2] [nf30] こい /kˈo̞i/, () コイ /kˈo̞i/
(noun (common) (futsuumeishi))
Note: word usually written using kana alone(m) Khoikhoin, (m) Khoikhoi, (m) Khoi, (früher)Hottentotte(m) (Völkerfamilie in Süd‑ und Südwestafrika), (m) Karpfen, Cyprinus carpio