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Sternopygus obtusirostris Steindachner, 1881 |
| Family: | Sternopygidae (Glass knifefishes) | |||
| Max. size: | 56 cm TL (male/unsexed); max.weight: 250.0 g | |||
| Environment: | benthopelagic; freshwater; pH range: 3 - 6 | |||
| Distribution: | South America: main stem of Amazon River, lower Negro River basin in Brazil. | |||
| Diagnosis: | Dorsal spines (total): 0-0; Dorsal soft rays (total): 0-0; Anal soft rays: 195-312. Body and head of living specimens uniformly black or very dark purple-brown with no humeral spot or patch; juveniles undergo striking pigmentation change from uniformly black by day to very pale with two distinct vertical saddle-like markings at night; dorsal margin of head well rounded (very convex) in adults (Ref. 52797). Description: Caudal fin absent. | |||
| Biology: | Inhabits blackwater rivers and their seasonally inundated floodplain lakes and forests (Ref. 52797). Feeds on invertebrates (Ref. 52797). | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 03 December 2020 Ref. (130435) | |||
| Threat to humans: | harmless | |||