All three known specimens of Dermatias platynogaster were collected in the Western North Pacific Ocean, with gear fished on the bottom: one off Luzon in the Philippines taken with a beam trawl in relatively shallow water (549 m); another in the vicinity of the Magellan Seamounts, east of the Mariana Islands, with a bottom trawl fished at a maximum depth of 1342 m; and the third from the Townsville Trough, off Queensland, Australia, with a bottom trawl fished at 1188 m.