From Japanese-German FreeDict Dictionary ver. 0.2.0:
[ichi1] 蛸 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 章魚 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, 鮹 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] たこ /tˈäko̞/, () タコ /tˈäko̞/ (noun (common) (futsuumeishi))
Note: word usually written using kana alone(1) (m) Oktopus, (m) Krake, (m) Polyp, (2) (m) Glatzkopf