鲤鱼 (lǐ yú) is a common noun meaning 'carp'—a freshwater fish widely found across Asia and culturally significant in China. The character 鲤 (lǐ) specifically denotes this type of scaled, often orange or silvery fish, while 鱼 (yú) means 'fish' in general; together, they form a compound noun where the first character narrows the category and the second provides the broader class. Unlike generic terms like 鱼, 鲤鱼 refers unambiguously to carp species, especially the common carp (Cyprinus carpio), and is never used for unrelated fish like salmon or tuna.

In Chinese culture, 鲤鱼 symbolizes perseverance, prosperity, and good fortune—most famously in the legend of the carp leaping over the Dragon Gate to become a dragon. It appears frequently in folklore, art, festivals (e.g., Lunar New Year decorations), and cuisine, where it’s prized for its firm flesh and auspicious homophone with 'profit' (利, lì). While sometimes used metaphorically, 鲤鱼 remains primarily a concrete, zoological term in everyday speech.