Creagrutus ignotus is a species of freshwater ray-finned fish, a characin, belonging to the family Stevardiidae.Vari, R.P. and A.S. Harold, 2001. Phylogenetic study of the Neotropical fish genera Creagrutus Günther and Piabina Reinhardt (Teleostei: Ostariophysi: Characiformes), with a revision of the Cis-Andean species. Smith. Cont. Zool. 613:1-239.
Location It is native to South America, occurring in the upper Tapajós River basin.
Size This species reaches a length of .
Etymology The species name is derived from Latin for 'unknown,' referring to the prior absence of any records of Creagrutus in the upper Rio Tapajós basin of central Brazil.
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