Astyanax orthodus Eigenmann, 1907
photo by Pacheco Chaves, B.

Family:  Characidae (Characins; tetras), subfamily: Stethaprioninae
Max. size:  10.78 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  South America: Colombia.
Diagnosis:  Predorsal midline with a continuous series of scales covering more than three quarters of the distance between the posterior tip of supraoccipital spine and dorsal-fin origin and the caudal-peduncle spot restricted to the midlateral axis of the body, not extending on to the dorsal and ventral margins of bases of caudal-fin rays (Ref. 119406).
Biology:  Recorded in streams and ponds between 1 and 60 m elevation. Schools are found in waters ranging from stagnant to swift current at temperatures of 24 to 28°C. Feeds on seeds, terrestrial and aquatic insects (Ref. 36880).
IUCN Red List Status: Least Concern (LC); Date assessed: 09 October 2014 Ref. (130435)
Threat to humans:  harmless


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