Hoplias microcephalus is a species of trahiras.

[3] It is a tropical, benthopelagic freshwater fish which is known to inhabit the São Francisco River in Brazil.

[3] Males can reach a maximum length of 35.6 cm (14.0 in).

[3] H. microcephalus was originally described by Louis Agassiz in 1829, under the genus Erythrinus.

[4] It was listed as a valid species of Hoplias by O.T.