Borders shift beneath my waves, where saltwater and freshwater meet, creatures adapt to dance in brackish tides. Identify me.

Category: Geography · Difficulty: expert

Hint: Consider where rivers greet the sea, changing the nature of water itself

Answer

An estuary at a river mouth

Explanation

Estuaries occur where rivers meet the ocean, mixing fresh and salt water to create unique ecosystems with brackish water, supporting diverse life adapted to this environment.

This is a expert geography riddle — one of the harder riddles here. The answer is An estuary at a river mouth.

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