鯨

1. Origins, structure, and basic meaning

• Structure: 鯨, read くじら, is a single noun and character spelling for a whale living in the sea.
• Basic usage: It denotes the very large marine mammal that blows through a blowhole, as in 鯨が潮を吹く, and is read くじら.

2. Common pitfalls and similar expressions

• Scope and context
  • Do not confuse its biological class with fish 魚; a whale is a mammal.