- 鲤鱼跳龙门 lǐyútiàolóngmén to achieve great successLiterally meaning "the carp leaps over the Dragon Gate," this idiom describes making a sudden, significant advance in one's career or status, such as passing a high-level exam or getting a big break.
- 双鲤鱼 shuānglǐyú lettera letter or correspondence, so named because ancient Chinese letters were historically protected between two wooden boards carved in the shape of a fish
- 鲤鱼打挺 lǐyúdǎtǐng kip-upTo spring from a lying position to a standing position in a single movement, used in martial arts and gymnastics; also used figuratively for jolting upright in bed.
- 鲤鱼旗 lǐyúqí koinoboria Japanese carp-shaped windsock flown to celebrate Children's Day