亀

1. Origins, structure, and basic meaning

• Structure: 亀 is read as かめ and is a noun for a turtle, the shelled animal found in water or on land.
• Basic usage: Basking appears in 亀が日光を浴びる, while watching one move appears in 亀を見守る.

2. Common pitfalls and similar expressions

• A general animal name
  • It is the ordinary broad word for turtles encountered around water or on land.
• Difference from 海亀
  • 亀 is the general term, whereas 海亀 narrows the meaning specifically to a sea turtle.