it is a straight.
A narrow channel joining two larger bodies of water
An isthmus.
Isthmus
River or Canal
That would be an isthmus.
Straits are a narrow strip of water connecting two large bodies of water.
A comparatively narrow passageway connecting two large bodies of water.
what is an articial waterway
A narrow landform connecting two large pieces of land is called an isthmus. It is typically a narrow strip of land with water on both sides, connecting two larger landmasses or separating two bodies of water.
It is called an isthmus.
a large ocean inlet, or a narrow ocean channel between two bodies of land
Strait Source: http://worldlandforms.com/landforms/list-of-all-landforms/