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" ... A. gollum doesn't display characteristic evolutionary adaptions of cave-dwelling fishes, like a lack of skin pigments or eyes, of no use in the pitch darkness of underground habitats. However, unusually for snakeheads, the new species has an incredibly long and eel-like body, maybe an adaption to swim in narrow rock fissures. The researchers believe that A. gollum has only recently evolved to live in a subterranean environment, or it is living in some kind of transition zone where it is still moving between the underground and above ground habitats. ... "