The blind fish of Mammoth Cave.
D000220:Adaptation, Biological; D000818:Animals; D005075:Biological Evolution; D002829:Choroid / Q000033:anatomy & histology; D005123:Eye / Q000033:anatomy & histology*; D005399:Fishes / Q000033:anatomy & histology*; D007629:Kentucky; D009801:Oculomotor Muscles / Q000033:anatomy & histology; D009802:Oculomotor Nerve / Q000033:anatomy & histology; D009900:Optic Nerve / Q000033:anatomy & histology; D012590:Sclera / Q000033:anatomy & histology; D014785:Vision, Ocular