? What does the love between fish and water mean? What are the allusions? What is English translation?

The source of the allusion: Bi's Biography of Mr. Penglai: "The love between fish and water is very entertaining. Idiom meaning: Feelings are as deep as fish and water. Universal Pinyin: YushuǐzhοQing Usage Frequency: Words in common idioms: Four-character idiom meaning * * * Color: Neutral idiom Usage: Love between fish and water, as predicate and attribute; Used of relationships, etc. Idiom structure: a more formal idiom synonym: fish and water are deep.