''Nannostomus grandis'' is a freshwater

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...

belonging to the

characin Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationshi ...

family

Lebiasinidae The pencil fishes are a family (Lebiasinidae) of freshwater fishes found in Costa Rica, Panama, and South America. They are usually small and are known as ornamental fishes in aquaria, including popular fishes such as the various pencil fish a ...

. This species is closely related to '' Nannostomus beckfordi'', being somewhat similar in coloration, but with a more elongated body. It has been described as the largest member of the genus; however, ''N. harrisoni'' consistently reaches a mature length in excess of 60 mm and is the more likely claimant for that distinction. It was only recently formally described by Zarske, although the author reports it probably had been assumed to be a form of ''N. beckfordi'' in the past and had even been exported for the aquarium trade at times. It is native to

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

and currently has no accepted common name.

References

Lebiasinidae Taxa named by Axel Zarske Fish described in 2011 Fish of South America Fish of the Amazon basin {{characiformes-stub