Clear Creek

Native or not?

Not all fish in the streams are Idaho natives. Some fish were brought to Idaho because people liked a particular kind of fish.

These are some of the common native fish found in the Boise Forest: shorthead sculpin, westslope cutthroat trout, leopard dace, largescale sucker, and northern pikeminnow.

Idaho westslope cutthroat trout.

These fish species are common in forest streams, but they are not native to Idaho: rainbow trout, brook trout, common carp, bluegill, white crappie and smallmouth bass.

Take A Hike Through the Boise National Forest
Home Sweet Home Tripod Peak Area Red Mountain Area Site Map Links Boise National Forest Web Site

RiffleThis part of the stream is a riffle. Riffles are the shallower, faster moving sections of a stream. Look for areas with a fast current where rocks break the water surface. That's a riffle.

Underwater riffleRiffles are important to fish habitat. As water rushes over the rocks it adds oxygen to the water. Insects that live in the water need oxygen, so they like to live in the riffles. Fish can find food to eat in riffles.

Fish in gravelThe rocks on the bottom of the stream are called "gravel." They are also important to fish habitat.

Streams with too much sediment covering the gravel are a big problem for fish. Fish lay their eggs in the gravel. If the gravel gets filled with sand or dirt, the eggs smother.

In a clear, clean stream as many as 60% of a fish's eggs will survive. Maybe only 5% will survive if there's sediment in the stream.

Take the Bait – What To Remember When Talking About Fish Habitat!

Good fish habitat- A good fish stream has "clean" gravel - there's no dirt between the rocks.

- Good fish habitats also have pools, insects, shade, aquatic plants and lots of plants on the banks.

- Sediment in the stream can cloud the water so fish can't see predators.

- Sediment also can clog fish gills and smother fish eggs.