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 ...
of
catfish
Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...
Achille Valenciennes
Achille Valenciennes (9 August 1794 – 13 April 1865) was a French zoologist.
Valenciennes was born in Paris, and studied under Georges Cuvier. His study of parasitic worms in humans made an important contribution to the study of parasitology. ...
in 1840, originally under the genus ''
Arius
Arius (; grc-koi, Ἄρειος, ; 250 or 256 – 336) was a Cyrenaic presbyter, ascetic, and priest best known for the doctrine of Arianism. His teachings about the nature of the Godhead in Christianity, which emphasized God the Father's un ...
''. It inhabits mud on the floors of
brackish
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...
and marine waters between the
Gulf of Venezuela
The Gulf of Venezuela is a gulf of the Caribbean Sea bounded by the Venezuelan states of Zulia and Falcón and by La Guajira Department, Colombia. The western side is formed by the Guajira Peninsula. A strait connects it with Maracaibo Lake to ...
and the
Amazon River
The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the disputed longest river system in the world in comparison to the Nile.
The headwaters of t ...
, at a depth range of . It reaches a maximum
total length
Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology.
Overall length
* Standard length (SL) is the length of a fish ...
of , more commonly reaching a TL of .
The Thomas sea catfish is currently ranked as Least Concern by the IUCN redlist. It spawns during the months of May and June. Its meat is of minor commercial value, and is marketed fresh.