Adults inhabit flowing pools of creeks and small rivers, usually near brush or other cover . Migratory behaviour is undetermined .
Dorsal soft rays (total): 9; Anal soft rays: 8. Gila nigrescens can be distinguished by the following characters: lateral line with 67-78 scales; dorsal fin with 9 rays; anal fin with 8 rays; 1st gill arch with 9014 rakers; pharyngeal teeth 2,5-4,2; deep, compressed body; long, fairly slender caudal peduncle; terminal mouth on rounded snout; olive-gray above; silver side; clear to slate gray fins; and breeding individuals with red-orange mouth and paired and anal-fin bases .: fusiform / normal.
Behavioural data for Chihuahua chub is currently being reviewed.
Freshwater; benthopelagic. Subtropical; 33°N - 30°N North America: Mimbres River in New Mexico, USA; Lagunas Guzman and Bustillos, Chihuahua in Mexico.
The following diseases are known to affect Chihuahua chub.
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed .
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