| Family: |
Characidae (Characins; tetras), subfamily: Stethaprioninae |
| Max. size: |
10.51 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
Central America: Lakes Ocotal and Metzabok, and Río Tulijá in northern Chiapas, Mexico. |
| Diagnosis: |
Dorsal soft rays (total): 9-9; Anal soft rays: 22-24; Vertebrae: 31-31. Astyanax ocotal is distinguished from other congeners in the region by the following characters: head length, 29-33% SL (vs. 22- 28% in A. angustifrons and A. finitimus, to 30% in A. aeneus); anal-fin base length, 26% SL or less (vs. 26% or more in A. aeneus and A. finitimus); lower-limb gill rakers in first arch, 15-16 (vs. 14 or fewer in A. angustifrons and A. finitimus); urohyal, ventral apex closer to caudal end (vs. about equidistant between rostral and caudal ends in A. finitimus); epibranchial III, distal segment straight (vs. curved in A. finitimus); preopercle with divergent canals at angle (vs. canals parallel in A. angustifrons); coracoid with 4-5 interdigitations in suture to cleithrum (vs. 2-3 in A. angustifrons) (Ref. 118583). |
| Biology: |
|
| IUCN Red List Status: |
Near Threatened (NT); Date assessed: 05 February 2019 (B1a+2a) Ref. (130435)
|
| Threat to humans: |
harmless |
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