The Penopus microphthalmus lives in the bathydemersal, marine, depth range 1320 - 3535 m environment.
New captures of Penopus microphthalmus (Vaillant, 1888), and status of Penopus macdonaldi Goode & Bean, 1896 (Pisces, Ophidiidae) Auteur(s) / Author(s) SERET B. More