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Craterocephalus nouhuysi (Weber, 1910) Mountain hardyhead |
| Family: | Atherinidae (Silversides), subfamily: Craterocephalinae | |||
| Max. size: | 10 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater; pH range: 7 - 7.80000019073486; dH range: 8 - 18 | |||
| Distribution: | Asia and Oceania: Lorentz River in Irian Jaya, Indonesia and Upper Fly-Strickland River systems in Papua New Guinea. | |||
| Diagnosis: | Dorsal spines (total): 7-9; Dorsal soft rays (total): 8-10; Anal spines: 1-1; Anal soft rays: 9-10 | |||
| Biology: | Inhabits relatively fast-flowing streams, usually forming schools in rocky pools or quiet backwaters. | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 03 December 2019 Ref. (130435) | |||
| Threat to humans: | harmless | |||