Melanorivulus modestus
Melanorivulus modestus (Costa, 1991)
Melanorivulus modestus
photo by Vermeulen, F.


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Family:  Rivulidae (Rivulines), subfamily: Rivulinae
Max. size:  4 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 6.5 - 7, non-migratory
Distribution:  South America: Tapajós River basin, Brazil.
Diagnosis:  Dorsal soft rays (total): 10-11; Anal soft rays: 13-14; Vertebrae: 30-30. Sides of body and unpaired fins of males without dark markings. 31-35 total caudal-fin rays. Body depth always greater than 20.0% SL (Ref 26657).
Biology:  Not a seasonal killifish. Is difficult to maintain in aquarium (Ref. 27139).
IUCN Red List Status: Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


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