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Archolaemus is a genus of South American glass knifefishes.[1][2] They occur in fast-flowing sections of rivers, including rapids, in the Amazon, Tocantins, São Francisco and Araguari basins.[2] Depending on the exact species, they reach up to about 20–50 cm (8–20 in) in total length.[3] During the day they hide in rocky crevices, but during the night they are active and feed on small invertebrates such as aquatic insect larvae.[2]

Archolaemus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Gymnotiformes
Family:	Sternopygidae
Genus:	Archolaemus Korringa, 1970
Type species
Archolaemus blax Korringa, 1970

Species

There are currently six recognized species in this genus:[2][3]

References

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