In the river. Not over it. Not under it. And not next to it. In the river.
It depends what type of fish and what river or lake. Usually for a river the best place is at a long, not too shallow, slow flowing area.
the Missouri river
Tributary. The Missouri river is a tributary of the Mississippi river.
The source
its body
the Missouri river
it is the fitzroy river in the southern part of Colorado
Yes! Fish have backbones for the most part.
It's a long river and fishing methods depend on which part of the Thames you are fishing.
The Indus River.
The Missouri River
most narrow part
Photographs of the river show that there are waterbirds there who presumably live for the most part on the river.