Facultative air-breathing in the genus ; Inhabits slow-flowing muddy streams. Also encountered inside submerged, hollow logs during the day .
Dorsal spines (total): 2; Dorsal soft rays (total): 7; Anal spines: 1; Anal soft rays: 4. Distinguishes from its congeners by having dark vermiculations on the abdomen (vs. spots, long, fairly straight, wide lines, or plain); also from all congeners except Peckoltia bachi by having the dorsal and lateral surface of the body mottled (vs. with spots or saddles); and from P. bachi by having the spots on the head small (vs. large) and generally forming vermiculations (vs. separate), the pelvic spines narrow (vs. wide), and the eye high on the head (vs. low) .: elongated.
Behavioural data for Peckoltia Caenosa is currently being reviewed.
Diet information for Peckoltia Caenosa is currently being compiled.
Reproduction data for Peckoltia Caenosa is currently being compiled.
Freshwater; benthopelagic. Tropical; 10°N - 6°N, 68°W - 59°W South America: llanos of Venezuela in rivers draining into the middle Río Orinoco.
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