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Revisiting the 1964 Archimède bathyscaphe dive to 7300 m in the Puerto Rico Trench, abundance of an elasipodid holothurian Peniagone sp. and a resolution to the identity of the ‘Puerto Rican snailfish’

Lookup NU author(s): Dr Alan Jamieson, Dr Thomas Linley

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Abstract

© 2020 Elsevier LtdThe first direct observations of the diversity and density of benthic epifauna from hadal depths was reported in 1965 from depths of 7300 m in the Puerto Rico Trench. The most striking part of the report from was an account of observing 200 snailfish (Liparidae) during a one mile transect by the bathyscaphe Archimède - an extraordinarily high-density of fish for hadal depths. In 2019 the submersible DSV Limiting Factor revisited the exact same site in the Puerto Rico Trench. No snailfish were observed. However, a large number of the holothurian Peniagone sp. were seen in a density similar to that reported originally for the snailfish. The holothurian has a similar exterior colour, texture and morphology to the snailfish. It is concluded that the reported hadal snailfish of the Puerto Rico Trench was in fact a misidentification of the holothurian Peniagone sp.

Publication metadata

Author(s): Jamieson AJ, Linley TD, Stewart HA, Nargeolet P-H, Vescovo V

Publication type: Article

Publication status: Published

Journal: Deep-Sea Research Part I: Oceanographic Research Papers

Year: 2020

Volume: 162

Print publication date: 01/08/2020

Online publication date: 20/06/2020

Acceptance date: 05/06/2020

ISSN (print): 0967-0637

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.dsr.2020.103336

DOI: 10.1016/j.dsr.2020.103336

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