It is called a sand bar
The difference is that a spit is that one end of a spit is connected to the shore, and the other end is in the ocean. A sand bar is close to the shore, but is not attached to it. Sandbars can be underwater or poking out of the surface of the ocean. Below are some links for images to help you get the idea.
sand dunes,sand bars , sand spits and barrier islands
Moon sand moon sand sand that moulds like dough
sand
Sand Bar
A 'sand bar'.
In the ocean. its a bar of sand in the ocean created by waves in the ocean.
It is called a sand bar
Sand bars are located in rivers.
Beauregard invented a self-acting sand bar excavator so ships on the Mississippi river would be passable with out getting stuck on a sand bar.
An island or sand bar
A point bar is found on the inside of a river meander and is the result of the deposition of sand etc
cs
Doggerbank
baymouth bar
Sand bar