The mantle of Egea inermis is shaped like a spindle, is approximately three times the length of the long and thin fins, and is made up of thin walls. Furthermore, the funnel is quite large and the species includes both a funnel organ and a developed valve. The head in contrast is small in size and includes two big eyes protruding toward the anterior. Both the head and the mantle are connected by a short neck, which therefore constricts the head. Moreover, the arms are short yet strong and include two rows of relatively large suckers. Overall, the best indications that an organism of this species is maturing into an adult are the fins increasing in length, the head and mantle experiencing changes, and the sexual organs developing.
Egea inermis is found in both the sub-tropical and tropical Atlantic waters. This species are mostly found close to land, are scattered throughout the open water in the oceans, and follow warm water currents.
^Julian Finn (2016). "Egia inermis Joubin, 1933". World Register of Marine Species. Flanders Marine Institute. Retrieved 28 February 2018.
^Herring, Peter J. (1987). "Systematic distribution of bioluminescence in living organisms". Journal of Bioluminescence and Chemiluminescence. 1 (3): 147–163. doi:10.1002/bio.1170010303. PMID3503524.
Voss, Nancy A. (1 December 1974). "Biological Results of the University of Miami Deep-Sea Expeditions Part 109 Studies on the Cephalopod Family Cranchiidae A Redescription of Egea-Inermis". Bulletin of Marine Science. 24 (4): 939–956.
Passarella, Kenneth C.; Hopkins, Thomas L. (September 1991). "Species Composition and Food Habits of the Micronektonic Cephalopod Assemblage in the Eastern Gulf of Mexico". Bulletin of Marine Science. 49 (1–2): 638–659.
