''Aenigmachanna mahabali'', the Mahabali snakehead, is a species of troglophilic

snakehead fish The snakeheads are members of the freshwater perciform fish family Channidae, native to parts of Africa and Asia. These elongated, predatory fish are distinguished by their long dorsal fins, large mouths, and shiny teeth. They breathe air with ...

that is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

Indian state India is a federal union comprising 28 states and 8 union territories, with a total of 36 entities. The states and union territories are further subdivided into districts and smaller administrative divisions. History Pre-indepen ...

Kerala Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...

.The fish is named after

Mahabali Mahabali (IAST: Mahābalī), also known as Bali, Indrasenan, or Māveli, is a daitya king featured in Hinduism. He is the grandson of Prahlada, and a descendant of the sage Kashyapa. There are many versions of his legend, in ancient texts such ...

, an

asura Asuras (Sanskrit: असुर) are a class of beings in Indian religions, Indic religions. They are described as power-seeking clans related to the more benevolent Deva (Hinduism), Devas (also known as Suras) in Hinduism. In its Buddhism, Buddhi ...

king from

Hindu mythology Hindu mythology is the body of myths and literature attributed to, and espoused by, the adherents of the Hindu religion, found in Hindu texts such as the Vedic literature, epics like ''Mahabharata'' and ''Ramayana'', the Puranas, and reg ...

who lived underground and is associated with

Onam Onam ( ) is an annual Indian harvest festival celebrated predominantly by the Hindus of Kerala. A major annual event for Keralites, it is the official festival of the state and includes a spectrum of cultural events. Onam commemorates Vamana ...

. It is known from a single specimen recovered from a well over 200 kilometers south of the locality where its closest relative, '' A. gollum'', was found. Alongside ''A. gollum'', it is unique for being the only known cave-dwelling snakehead fish. It can be distinguished from ''A. gollum'' due to having fewer

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through conv ...

rays,

vertebra The spinal column, a defining synapomorphy shared by nearly all vertebrates,Hagfish are believed to have secondarily lost their spinal column is a moderately flexible series of vertebrae (singular vertebra), each constituting a characteristic ...

e, and lateral

scales Scale or scales may refer to: Mathematics * Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number w ...

, as well as its

pectoral fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as ...

rays extending beyond the margin of the membrane, forming filaments.

References

Fish described in 2019

mahabali Mahabali (IAST: Mahābalī), also known as Bali, Indrasenan, or Māveli, is a daitya king featured in Hinduism. He is the grandson of Prahlada, and a descendant of the sage Kashyapa. There are many versions of his legend, in ancient texts such ...

Cave fish Fauna of Kerala Freshwater fish of India Endemic fauna of India {{Rayfinned-fish-stub