Adults inhabit flowing pools of headwaters, creeks and small rivers. They occur usually near brush . They are mid-water carnivores feeding on zooplankton, aquatic and terrestrial insects, crustaceans, juvenile fish, and a limited amount of detritus . Migratory behaviour is undetermined .
Dorsal soft rays (total): 8; Anal soft rays: 8. Gila pandora can be distinguished by the following characters: lateral line with 51-67 scales; dorsal fin with 8 rays; anal fin with 8 rays; 1st gill arch with 6-10 rakers; pharyngeal teeth 2,5-4,2; slightly subterminal mouth, extending to front of large eye; rounded, fairly blunt snout; fairly deep, compressed body; deep caudal peduncle; olive-gray above; 2 dusky stripes along silver sides (darkest on large individual), upper one extending to caudal fin, lower one to anal fin; and dusky to black caudal spot. Breeding individuals with red-orange (brightest in males) anal, dorsal and paired fin bases and side of head; orange lower side .: fusiform / normal.
Behavioural data for Rio Grande chub is currently being reviewed.
Diet information for Rio Grande chub is currently being compiled.
Reproduction data for Rio Grande chub is currently being compiled.
Freshwater; benthopelagic. Temperate; 42°N - 31°N North America: Upper Rio Grande and Pecos River systems in Colorado and New Mexico, USA; isolated populations in Davis Mountains (Pecos River system) in Texas, USA.
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