Chiselmouth
📖 Overview
Adults occur in flowing pools and runs over sand and gravel in creeks and small to medium rivers; also in margins of lakes . Adults feed mainly on diatoms, also on filamentous algae; young feed on surface insects .
🔬 Taxonomy
🐟 Physical Description
Dorsal soft rays (total): 10 - 11; Anal soft rays: 9 - 10. Moderately compressed body, deepest in front of dorsal fin; strong tapering to narrow caudal peduncle; large, forked caudal fin; wide head; subterminal mouth; hard plate on lower jaw; large eye; dorsal-fin origin over pelvic-fin origin; rounded, protruding snout; decurved, complete lateral line with 85-93 scales; long intestine (at least twice length of body) ; black peritoneum; dorsal fin with 10-11 rays; anal fin with 9-10 rays; pharyngeal teeth 0,4-4,0 to 0,5-5,0; gray above, brassy silver side; yellow to brown fins; large individuals with gray dorsal and caudal fins, orange at pectoral and pelvic-fin bases . Tail large and flaring. Lower jaw bears a sharp edge, nearly square when viewed from beneath. Sharp part of lip consist of cornified epithelium which is sometimes slightly calcified. Internal to the fleshy upper lip is a small, hard plate upon which the lower lip bears. Young fish have a more rounded lower lip, when viewed either laterally or from below. Digestive tract in adults is about twice the length of the body, with most of its length consisting of a coiled section posterior to the entry of the bile duct .: fusiform / normal.
🌀 Behaviour
Behavioural data for Chiselmouth is currently being reviewed.
🦐 Diet
Diet information for Chiselmouth is currently being compiled.
🥚 Reproduction
Reproduction data for Chiselmouth is currently being compiled.
🌍 Habitat & Distribution
Freshwater; demersal; potamodromous . Temperate; 55°N - 41°N North America: Fraser and Columbia River drainages in British Columbia in Canada, Washington, Idaho, Oregon, and Nevada in USA; Harney River basin in Oregon, USA.
🌿 Ecology
diatoms, also on filamentous algae; young feed on surface insects (Ref
📐 Morphometrics
🌡️ Water Parameters & Tolerance
📊 Population Risk & Fisheries
🔍 Similar Species
👥 Community & Contribute
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