Since the description of the Bahamian cave-fish Lucifuga spelaeotes Cohen & Robins, 1970, which was based on two specimens from New Providence Island, the species has been observed and/ or collected several times in marine blue-holes and inland caves on various Bahamian Islands. Hitherto, all Lucifuga records from the Bahamas have been referred to L. spelaeotes, but examination of 50 specimens (42–166 mm SL) collected at 7 different islands showed that two species are represented in the Bahamas: 44 specimens from Berry, New Providence, Eleuthera, Great Exuma and Long Island belong to L. spelaeotes, whereas 6 specimens from Grand Bahama and Abaco Islands are referable to L. lucayana, new species. The new species is here described and compared to the material of L. spelaeotes, which includes specimens from several hitherto unpublished locations. The two species are well separated from the Cuban species in number of caudal finrays (10 vs. 8), size of eye (0.7–1.8 vs. 0.0–0.3 % SL) and number of vertebrae (50–55 vs. 45–48). The Bahamian species differ from each other mainly in head squamation, palatine dentition, number of finrays and pigmentation of the three elongated gill-rakers. Lucifuga lucayana is geographically separated from L. spelaeotes by the deep waters of the Northeast and Northwest Providence Channels.
Progress on the degeneration mechanism of cave fishes’ eyes
