noun
A shallow body of water separated from a larger body of water by a barrier such as a sandbar or coral reef. Used in geography and nature descriptions.
この潟湖は多くの水鳥の生息地です。
This lagoon is a habitat for many waterfowl.
潟湖の水は穏やかで、泳ぐのに適している。
The water of the lagoon is calm and suitable for swimming.