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Regional Fish Species Information

Printable Guides & External Links

Report Tagged Fish Here
Idaho Fish Species Database Here
Idaho Fish Species Identification Guide Here

It is important to be able to identify the fish. Sport fishing regulations are different for each species and it is your responsibility to have knowledge to be able to identify each species to know which regulations apply.

Becoming familiar with the appearance of some of the game fish will help you learn to identify them. This is important because in some cases, sport fishing regulations are different for each species and it is your responsibility to accurately identify each species to know which regulations apply. Having a knowledgeable guide ensures that you will be able to enjoy a worry-free experience. Click here to learn about our professional guide service.


Species

Identification

Information
Rainbow Trout
(Oncorhynchus mykiss) 		Click to See Larger Image of Rainbow Trout

Idaho's #1 game fish.  Found in lakes, rivers, & streams.
Yellowstone & Snake River Cutthroat Trout
(Onchorhynchus clarki) 		Click to See Larger Yellowstone Cutthroat Trout Click to See Larger Image of West Slope Cutthroat

The Yellowstone Cutthroat Trout is the only native Trout species in the region.
Brown Trout
(Salmo trutta) 		Click to See Larger German Brown Trout Image

2nd most prevelant fish in the Henry's Fork region.  Revered as the most selective of trout, Nocturnal and piscivorous.
Mountain Whitefish
(Prosopium williamsoni) 		Click to See Larger Rocky Mountain Whitefish Image

Reliable fast action on most regional rivers & streams.  Primarily caught nymphing.
Arctic Grayling
(Thymallus thymallus) 		Click to See Larger Image of Arctic Greyling

Scrappy surface feeding salmonid found in a few regional fisheries.  A very rare species to the region.
Carp
(Cyprinus carpio) 		Click to See Larger Image of Carp

Gaining popularity as a hard fighting fly rod game fish.
Smallmouth Bass
(Micropterus salmoides) 		Click to See Larger Image of Small Mouth Bass

Hard-fighting warm water black bass. Catchable with a fly rod in a few regional waters.
Yellow Perch
(Perca flavescens) 		Click to See Larger Image of Perch

Prolific cousin of the Walleye. Usually fished on a full-sinking line.

Idaho State Record Trout

Species

Weight

Length

Girth

Location

Date
Brook 8 lb. 3oz 25.5" 16.5”
Henry’s Lake
1988
Brown 27lb.5oz 37” 24”
Ashton Reservoir
2007
Cutthroat 18lb.15oz N/A N/A
Bear Lake
1970
Golden 5 lb. 2oz N/A N/A
White Sands Lake
1958
Whitefish 5 lb. 14.4oz 22.5” 14”
Island Park Reservoir
1997
Rainbow 19lb N/A N/A
Hayden Lake
1947
Hybrid 24lb 35.5” 24.5”
Pend Oreille Lake
1991