An isthmus.
That would be an isthmus.
Straits are a narrow strip of water connecting two large bodies of water.
a paradox
Strait Source: http://worldlandforms.com/landforms/list-of-all-landforms/
isthmus - When a narrow strip connects two land masses. If it projects into ocean without connecting any land mass, it is called peninsula.
a strait is a narrow passage of water connecting two larger bodies of water. An isthmus is a narrow strip of land, bordered by water, connecting two larger bodies of land
isthmus
a narrow strip of land connecting to large land masses
An Isthmus. Well-known isthmus is the country of Panama or the Sinai Peninsula. They are commonly crossed by canals, such as the Panama canal or the Suez canal.
An isthmus.
An isthmus is a narrow strip of land bordered on both sides by water, connecting two larger bodies of land
a narrow strip of land, bordered on both sides by water, connecting two larger bodies of land.