The Eustomias mesostenus lives in the bathypelagic, marine, depth range 0 - 1643 m environment.
Eustomias mesostenus Gibbs, Clarke & Gomon 1983 Eustomias mesostenus Gibbs, Clarke & Gomon 1983, Smithson. Contr. Zool. (380): 118, fig. 32f. Type locality: South-central Indian Ocean, 18°49'S, 88°05'E, 0-1643 m. Holotype (unique): SIO 61-34 (95 mm SL). More