The Psednos griseus lives in the bathydemersal, marine, depth range 0 - 4000 m environment.
Psednos griseus Chernova & Stein 2002 Psednos griseus Chernova & Stein 2002, Copeia 2002(3):771, fig. 10. Type locality: Eastern North Pacific Ocean, northwest of Isla Guadalupe, Mexico, 31 More