Aspects of the Biology and Morphology of the Snake Eel, <i>Pisodonophis cruentifer</i> (Pisces, Ophichthidae)

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<jats:p> Variability in meristic and morphometric characters and dentition of the snake eel, Pisodonophis cruentifer, is presented. Pisodonophis cruentifer is distributed from the Laurentian Channel in the north to just north of Cape Hatteras in the south and is most abundant between 150 and 400 m in the Norfolk Canyon area. Males collected in June 1973 possessed mature spermatozoa in testicular tissue while females had yolk-laden eggs 0.6–1.0 mm in diameter. The total length−fecundity relation is log<jats:sub>10</jats:sub> y = 4.28696 (log<jats:sub>10</jats:sub> x) − 7.33402, where y = total fecundity and x = total length in millimeters. Gross and microscopic morphology of the gonads is presented. Morphological adaptations of P. cruentifer for burrowing into the substrate are contrasted with the benthopelagic eel, Synaphobranchus qffinis, and actual burrowing into the substrate is documented. </jats:p>

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