What is a tiny river fish called?

There isn't one single name for a tiny river fish! It depends on the specific species and location.

Here are some possibilities:

* Minnow: This is a common term for small, freshwater fish, often used for a variety of species.

* Shiner: This is another general term for small, silvery fish, especially those found in rivers and streams.

* Darter: This group of fish, while not all tiny, includes many small species that inhabit rivers.

* Sculpin: These bottom-dwelling fish are often small and found in rivers and streams.

* Goby: A diverse family of fish with many small species found in rivers, streams, and even marine environments.

For more specific answers, you'll need to tell me:

* Where is the river located? Different regions have different native fish species.

* What is the size of the fish? Some "tiny" fish might be only a few inches long, while others are a bit larger.

* What does the fish look like? Color, shape, and other features can help narrow down the possibilities.

Once you give me some more information, I can help you find the right name!