- 鱼yúfishHSK 2
- 王八wáng bāsoftshell turtle; (slang) cuckold; bastard (used as an insult)HSK 7-9
- 鲨鱼shā yúsharkHSK 6
- 贝bèishell; shellfish (bound form, appears in compounds); treasure; precious object (in 宝贝); surname BeiHSK 7-9
- 鳄鱼è yúcrocodile; alligatorHSK 7-9
- 乌龟wū guītortoise; turtle; (slang) cuckoldHSK 6
- 鲨shāshark (bound morpheme, used in compounds like 鲨鱼)HSK 7-9
- 海豚hǎi túndolphinHSK 7-9
- 螃蟹páng xiècrabHSK 7-9
- 金枪鱼jīn qiāng yútunaHSK 7-9
- 鱿鱼yóu yúsquidHSK 7-9
- 大鱼dàbig fish (literal); (figurative) big shot, important personHSK 7-9
- 海龟hǎi guīsea turtleHSK 7-9
- 龟guītortoise, turtleHSK 7-9
- 章鱼zhāng yúoctopusHSK 7-9
- 鲑鱼guī yúsalmonHSK 7-9
- 蟹xiècrabHSK 7-9
- 贝壳bèi késhell (of a mollusk); seashell; conch; cowryHSK 7-9
- 珊shān(morpheme) used in 珊瑚 (coral)HSK 7-9
- 金鱼jīn yúgoldfishHSK 7-9
- 捕鱼bǔ yúto catch fish; to fish (as a livelihood or activity)HSK 7-9
- 鱼儿yú ér(colloquial, affectionate) fish; little fishHSK 7-9
- 河豚hé túnpufferfish, blowfish (Tetraodontidae); (also) river dolphin (Platanistoidea)HSK 7-9
- 水母shuǐ mǔjellyfishHSK 7-9
- 鱼缸yú gāngfish tank; aquarium; fish bowlHSK 7-9
- 蛤géclam; bivalveHSK 7-9
- 乌贼wū zéicuttlefish (a sea animal that releases ink when threatened)HSK 7-9
- 麦凯恩Mài kǎi ēnJohn McCain (American politician, 1936–2018)HSK 7-9
- 鳍qífinHSK 7-9
- 水族馆shuǐ zú guǎnaquariumHSK 7-9
- 珊瑚shān húcoralHSK 7-9
- 蛤蜊gé líclamHSK 7-9
- 鳟鱼zūn yútroutHSK 7-9
- 海星hǎi xīngstarfish, sea starHSK 7-9
- 白鲸bái jīngbeluga whaleHSK 7-9
- 蝌蚪kē dǒutadpoleHSK 7-9
- 沙丁鱼shā dīng yúsardine (fish)HSK 7-9
- 比目鱼bǐ mù yúflatfish (especially flounder and righteye flounder); (figurative) inseparable lovers; devoted coupleHSK 7-9
- 鲶鱼nián yúcatfishHSK 7-9
- 鳕鱼xuě yúcod, codfishHSK 7-9
- 鳗鱼mán yúeelHSK 7-9
- 飞鱼fēi yúflying fish (a marine fish of the family Exocoetidae); honorific title for a swimming or diving championHSK 7-9
- 鲤鱼lǐ yúcarpHSK 7-9
- 海洋生物hǎi yáng shēng wùmarine organisms; marine lifeHSK 7-9
- 清道夫qīng dào fūstreet cleaner (person); scavenger (esp. a species of aquarium fish that cleans algae)HSK 7-9
- 人鱼rén yúmermaid; a mythical creature with the upper body of a human and the tail of a fish; dugong; a marine mammal also known as the sea cowHSK 7-9
- 海蜇hǎi zhējellyfish (edible species, often served as a cold dish)HSK 7-9
- 蚌bàngfreshwater mussel; clamHSK 7-9
- 凤尾鱼fèng wěi yúanchovyHSK 7-9
- 海胆hǎi dǎnsea urchinHSK 7-9
- 海马hǎi mǎseahorse (marine fish); hippocampus (part of the brain)HSK 7-9
- 鲈鱼lú yúbass; perch (a type of freshwater or saltwater fish)HSK 7-9
- 鲱鱼fēi yúherringHSK 7-9
- 大马哈鱼dàchum salmonHSK 7-9
- 贝类bèi lèishellfish; mollusks (general term for aquatic mollusks with shells, such as clams, oysters, mussels)HSK 7-9
- 渔网yú wǎngfishing netHSK 7-9
- 鲤lǐcarp (bound form, used in compounds)HSK 7-9
- 鲭qīngmackerelHSK 7-9
- 梭鱼suō yúred-eye mulletHSK 7-9
- 螺luó(bound form) spiral; whorl (as in 螺旋, 指纹螺); (bound form) snail; conch (as in 螺蛳, 海螺); (bound form) screw (as in 螺丝)HSK 7-9