a canal.
another answer for desert waterway is arroyo (Spanish for brook)
the answer your looking for could be straits.
strait...
It is called a strait.
Any "Long narrow arm of the sea" would be called a FJORD.Hope that helps!
A strait.
A strait is a narrow body of water that connects two larger bodies of water. The opposite (a narrow piece of land that connects two larger pieces of land) is called an isthmus.
A narrow neck of land is called a peninsula. A peninsula is bordered by water on three of its sides.
A narrow body of water connecting two larger bodies of water is called a Strait.
A narrow body of water connecting two larger bodies of water is called a Strait.
a straight
a strait is a narrow passage (found in my social studies book)
The narrow strip of water at the southern tip of Spain is called the Strait of Gibraltar.
It is called an isthmus.
A narrow strip of land surrounded on 3 sides by water is a peninsula.
inlet