Tor remadevii

Tor remadevii, the orange-finned mahseer, also known as the hump-backed mahseer, is a critically endangered species of freshwater fish endemic to the Western Ghats of India.[1] It is restricted to the Kaveri river basin.

Orange-finned mahseer
Conservation status
Critically Endangered  (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Cyprinidae
Genus:	Tor
Species:	T. remadevii
Binomial name
Tor remadevii Kurup & Radhakrishnan, 2007

It can be distinguished from other mahseer from the prominent hump on its back, and its bright orange caudal fin. It is considered a high-quality game fish, and has been proclaimed by anglers as "the largest and hardest fighting freshwater fish in the world".[2] The reason for the species' endangerment is the introduction of a non-native "blue-finned mahseer" (generally considered to be Tor khudree, though the "blue-finned mahseer"'s classification is under scrutiny as it actually may be a different, undescribed species[2]) to the Kaveri river basin. Also endangering this species is the heavy construction of dams along the Cauvery, as well as the use of dynamite fishing.[3] These have led to a heavy crash in mahseer populations since 2004. Despite this endangered status, general lack of a formal scientific name has hampered efforts to protect species. However, a 2018 study found out that the orange-finned mahseer was in fact conspecific with Tor remadevii, a little-known species identified in 2007 based on a single juvenile individual from the Pambar River.[4] This has allowed the species to finally gain a scientific name, which may help conservation efforts.