Tor remadevii

Orange-finned mahseer
Young individual caught during a 2016 survey of the Moyar River
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Cyprinidae
Genus:	Tor
Species:	T. remadevii
Binomial name
Tor remadevii Kurup & Radhakrishnan, 2007

The orange-finned mahseer (Tor remadevii), also known as the hump-backed mahseer, is a highly endangered species of freshwater fish endemic to the Western Ghats of India. It is restricted to the Kaveri river basin.

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",^[1] but is extremely endangered. 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^[1]) 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.^[2] 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.^[3] This has allowed the species to finally gain a scientific name, which may help conservation efforts. A draft IUCN assessment has listed the species as Critically Endangered.

References