No. A stream of water that flows through the ocean, or another body of water, is called a current. Tsunamis and tidal waves are one in the same and occur when large volumes of water are displaced far out in the middle of the ocean or, on occasion, in large lakes. The most common causes are deep-sea earthquakes, volcanic eruptions, and landslides.
The stream of water which flows like a river through the ocean is a current. The Gulf Stream is the most significant such current which flows from the tropics to the northern latitudes.
Gulf Stream
Ocean current
An ocean current.
The Gulf Stream is a warm current that flows from the Gulf of Mexico into the North Atlantic Ocean. It helps to moderate temperatures in the regions it flows through and has a significant impact on weather patterns.
tributary
tributary
tributary
tributary
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One major current is the warm, Gulf Stream, that flows from the Gulf of Mexico to reach the British Isles.
There is no single name for a single stream of water that flows into an ocean but headwaters would be a good one for a single stream of water into a lake