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BLIND CAVE SALAMANDER Completely adapted to eternal darkness, the human fish hides in the depths of underground sources far from our inquisitive gaze. The pale skin contains no pigment and the tiny eyes can be seen only at the foetal stage. Later they athropy and skin grows over them. Approximately 25 cm long, with a flat tail surrounded by a skin-like fin, used for swimming, it is snake-like and this is the reason for its Latin species name anguinus (anguis = snake). It can also move using tvo pairs of legs - the front ones have three digits and the hind ones two. The entire body is more or less sensitive to light. environment. It breathes in three ways. It has an excellent sense of smell and it probably also has a highly specialised sense for weak electric currents, whic could partly explain its orientation abilities in the total darkness of the cave. On either side of its body, at the back of its head, there are three pairs of extended gills which have excellent blood circulation and are therefore of a bright red colour. In addition it has simple lungs, and when out of water it also breathes through its skin, for we must not forget that almost absolute humidity prevails in the cave environment. It eats small animals, such as cave shrimps, amphipods and the larvae of various insects. Sometimes, under the cover of the night, human fish swim to the cave exit where they hunt for small surface water animals. Cannibalism is not unusual in mocherils either, but a fully-grown ani