Gnathodolus

Gnathodolus bidens is a species of headstander endemic to the Orinoco and Casiquiare rivers in Venezuela. It is the only member of its genus.

Environment
Gnathodolus bidens is known to be found in a freshwater environment within a benthopelagic depth range. This species is native to a tropical climate.

Distribution
Gnathodolus bidens can be found in South America, Orinoco, Casiquiare rivers, and Venezuela.

Biology
Gnathodolus bidens has the ability to breed once the pair is in a heavily dense and weeded area. This species serves as no threat to humans and they are considered to be harmless.

Classification
The taxonomic classification of Gnathodolus bidens is as follows:
 * Kingdom : Animalia
 * Phylum : Chordata
 * Subphylum : Vertebrata
 * Superclass : Osteichthyes
 * Class : Actinopterygii
 * Subclass : Neopterygii
 * Infraclass : Teleostei
 * Superorder : Ostariophysi
 * Order : Characiformes
 * Family : Anostomidae
 * Subfamily : Anostominae
 * Genus : Gnathodolus 
 * Species : Gnathodolus bidens