Derhamia hoffmannorum is a species of freshwater fish endemic to Guyana, where it is found in the Mazaruni River. It is the only species in its genus. It is found in fresh water at pelagic depths in a tropical climate. The average length of an unsexed male is about 6.1 cm (2.4 in). It has an elongated body with large eyes. It is a timid species compared to other similar species such as the various pencilfish. They live near the surface of water and are known to hide whenever possible, usually under floating objects. This species only eats what can be found at the surface, as well. D. hoffmannorum will not seek food that sinks to the bottom. 
- "Derhamia hoffmannorum Classification". Animal Diversity Web. Retrieved 1 April 2013.
- "Derhamia hoffmannorum Géry and Zarske, 2002". ITIS Standard Report. Retrieved 1 April 2013.
- Froese, Rainer and Pauly, Daniel, eds. (2011). "Derhamia hoffmannorum" in FishBase. October 2011 version.
- "Derhamia hoffmannorum Géry & Zarske 2002". Fish Wise. Retrieved 1 April 2013.
- "Comprehensive Description Derhamia hoffmannorum". Encyclopedia of Life. Retrieved 1 April 2013.
- "Derhamia hoffmannorum Géry & Zarske, 2002". Fish Base. Retrieved 1 April 2013.
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