Blind dragon (Proteus candeguilla) or alternatively blind man is a species of salamander found in cave walls. The larva of the salamander lives mostly in complete darkness within underground ponds because of which it has underdeveloped eyes which can only see faint blobs of green light and no pigmentation making it have a sort of fleshy, pink colour. It is due to this it is often called the blind man. This faint glow is important for identifying other members of the species. It hunts using electroreceptors and hearing to find its prey. The larva eventually overgrows its pond and develops gray scales, receptors sensitive to vibrations and grows more fingers (from 3 to 6) with claws on its forelimbs. The now adolescent blind dragon burrows into the ground or walls of a cave from which it hunts whatever prey it finds using its keen sense of smell and vibrations. The adults can reach up to 30 m in length.