Now the probe was traveling upstream along the Grindstone River.

Suckers are another fish that travel upstream as the weather changes.

They skimmed over the water, traveling upstream a few hundred meters until the right bank rose to form a low cliff.

Elvers travel upstream in freshwater rivers, where they grow to adulthood.

Traveling upstream may have been even slower, as the boats had to be pulled by burlaks.

However, shockwaves will generally travel upstream at a rate of approximately 20 km/h.

This made it harder for fish to travel upstream.

The baskets on the wheel capture fish traveling upstream.

Every October people gather on its shores to watch the salmon traveling upstream.

Ayla kept watching the river as they traveled upstream.