Monomitopus

Monomitopus is a genus of cusk-eels. They are oviparous.

Life cycle
Analysis of stable oxygen isotope composition of otoliths has shown that Monomitopus pallidus and Monomitopus kumae undergo an ontogenetic habitat shift, spending their early life pelagically in shallower waters, before descending to the deep-sea floor where they stay for rest of their lives. The larvae of these species have been reported to coil tightly and drift in the pelagic until settlement.

Species
There are currently 15 recognized species in this genus:
 * Monomitopus ainonaka Girard, Carter & Johnson, 2023
 * Monomitopus agassizii (Goode & T. H. Bean, 1896)
 * Monomitopus americanus (J. G. Nielsen, 1971)
 * Monomitopus conjugator (Alcock, 1896)
 * Monomitopus garmani (H. M. Smith & Radcliffe, 1913)
 * Monomitopus kumae D. S. Jordan & C. L. Hubbs, 1925
 * Monomitopus longiceps H. M. Smith & Radcliffe, 1913
 * Monomitopus magnus H. J. Carter & Cohen, 1985
 * Monomitopus malispinosus (Garman, 1899)
 * Monomitopus metriostoma (Vaillant, 1888)
 * Monomitopus microlepis H. M. Smith & Radcliffe, 1913
 * Monomitopus nigripinnis (Alcock, 1889)
 * Monomitopus pallidus H. M. Smith & Radcliffe, 1913
 * Monomitopus torvus Garman, 1899
 * Monomitopus vitiazi (J. G. Nielsen, 1971) (Spearcheek cusk)