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Linophrynids are spectacular even among the most bizarre of their anglerfish relatives in having the largest mouths, with the longest dagger-like teeth of any fish and perhaps of any vertebrate. In addition to an elaborately adorned esca that harbors symbiotic bioluminescent bacteria, most are uniquely equipped with a complex bioluminescent chin barbel. These features, coupled with low dorsal and anal fin-ray counts, easily differentiate female linophrynids from those of all other Lophiiformes. The family consists of five genera, three of which contain only a single recognized species, while the fourth, Acentrophryne, contains two species, and the fifth, Linophryne, includes 22 species divided among three subgenera (Bertelsen, 1982:90-100).