![]() The Mariana snailfish, drawn by Thomas Linley. Check out the full taxonomic description of the Mariana snailfish here. We described this new species using morphological and genetic data and gave it an official scientific name, Pseuodoliparis swirei Gerringer & Linley 2017. ![]() In 2014, our international team of researchers discovered two new species of hadal snailfishes in the Mariana Trench. Recreating deep-sea pressures in the lab. Some enzymes may require additional stabilization to function under high pressure, such as with the osmolyte TMAO. This has implications for studies of trends of metabolic capacity with depth. Some metabolic enzymes in hadal snailfishes from the Kermadec and Mariana trenches are adapted to function best at in situ pressures. Hadal fishes have developed many adaptations to cope with high hydrostatic pressure. Using recent collections from the Mariana Trench, Kermadec Trench, and neighboring abyssal plains, some of our research investigates the role of trophic ecology, pressure adaptation, and life history in structuring fish communities at the abyssal-hadal boundary. Little is known about the biology of these deepest-living fishes, nor the factors that drive their success at hadal depths. The hadal fish community is distinct from the surrounding abyss where solitary, scavenging fishes such as rattails (Macrouridae), cutthroat eels (Synaphobranchidae), eelpouts (Zoarcidae), and cusk eels (Ophidiidae) are most common. These are the dominant fish group in at least five trenches worldwide. The snailfishes, family Liparidae (Scorpaeniformes), have found notable success in the hadal zone from ~6,000-8,200 m.
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