Chiselmouth
Acrocheilus alutaceus
Chiselmouth is a native Idaho freshwater fish listed by Idaho Fish and Game in the minnow family, Cyprinidae. The agency's Brownlee Reservoir planner calls it “Chiselmouth Chub”; both names refer to Acrocheilus alutaceus. Its 1996 survey observation is historical evidence, not a recent population assessment. The species catalog also records the common names hardmouth and squaremouth. Presence alone does not establish legal targeting, harvest or access.
Recorded in Brownlee Reservoir in 1996. No precise capture site or habitat preference is established by the reviewed water-level listing.
Image credit and sources
Species reference image (Acalu j0.jpg). Resized and recompressed; Public domain terms apply to this version. This is not evidence of a sighting at a linked water.
Image: PSMFC, SMP — Public domain
Species information reviewed 2026-10-19.
Chiselmouth Habitat & Size
Chiselmouth (Acrocheilus alutaceus) is associated with reservoir water in the species record. Habitat information describes the species, not permission to fish for it.
Recorded Waters for Chiselmouth
Outland Atlas links Chiselmouth to water records in Idaho. These associations may reflect documented presence, seasonal runs, or historical stocking, not angler catch reports or current abundance. Read the linked water guides and source notes for evidence dates and reaches.
Chiselmouth Fishing Regulations & Limits
A recorded association does not establish that targeting or retaining Chiselmouth is permitted. Confirm current species protections, seasonal and emergency closures, reach-specific rules, gear restrictions, bag and size limits with the responsible fisheries authority before fishing. A fishing license does not override these restrictions. Outland Atlas's regulation records may be incomplete; missing rules do not mean unrestricted fishing.
Related Water Guides for Chiselmouth
Explore these Outland Atlas water guides for places where Chiselmouth is recorded:
Equipment planning for Chiselmouth
We have not selected a species-specific affiliate setup for this guide. First establish whether targeting is permitted at your destination; no tackle recommendation should be inferred from a species record.
A closed season prohibits targeting, even with release. Follow the water-specific rules linked in this guide.
- Check permitted methods, bait and hook restrictions before choosing tackle. Match rod, line and lure ratings to the lawful method and conditions, rather than buying by species name alone.
- Plan weather protection, drinking water and a way to call for help. For boat trips, confirm required flotation and safety equipment with the responsible boating authority.
- Read the habitat and water-specific source notes in this guide, then confirm an appropriate lawful method with the local fisheries authority before choosing equipment. Do not assume a general freshwater combo suits every species or water.
This is an editorial planning checklist, not hands-on product testing. Use equipment you already own when suitable. The gear directory contains affiliate links; any product suggestions below have their own disclosure. Retailer region, availability and Canadian shipping are not guaranteed.
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Frequently Asked Questions
What water types are associated with Chiselmouth?
The species record associates Chiselmouth (Acrocheilus alutaceus) with reservoir water. Habitat information is not evidence of current abundance or permission to target the species.
Where does Outland Atlas record water associations for Chiselmouth?
Outland Atlas links Chiselmouth to water records in Idaho. These associations may reflect documented presence, seasonal runs, or historical stocking, not angler catch reports. Check the linked water guides and source notes for evidence dates and reaches; a listing does not guarantee current presence or legal fishing opportunity.
Does a listing or fishing license permit fishing for Chiselmouth?
No. A listing records an association, not permission to target or retain Chiselmouth. License requirements and exemptions vary. Confirm current species protections, seasonal and emergency closures, reach-specific rules, gear restrictions, bag and size limits with the responsible fisheries authority. A license does not override restrictions, and missing Outland Atlas regulation records do not mean unrestricted fishing.