Barbus hulstaerti Poll, 1945 The butterfly barb (Enteromius hulstaerti) is a species of cyprinid fish in the genus Enteromius.

[2] This species reaches a length of 3.5 cm (1.4 in).

[3] The fish is named in honor of Révérend Père Gustaaf Hulstaert (1900–1990), an entomologist, botanist and missionary in the Belgian Congo, who collected the type specimen.

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