I was told it was an "exotic stream."
It is called an ocean current or a river current. :)
The area where a freshwater river or stream enters the ocean is called an estuary. It is a coastal area of brackish water formed when freshwater enters the ocean.
stream, creek or either a lake or a ocean
current people
A river.
A natural stream of water larger than a creek and emptying into an ocean is called a river. The longest river in the world is the Nile River in Africa.
A stream or river called that flows into a larger stream or river is called a tributary.
A river of water in the ocean might be a way to describe an ocean current, such as the Gulf Stream.
The Amazon River is also known as the Ocean River.
Tributary
Tributary is the answer you are looking for, I believe.
A small stream in a river is called a current.