Joubiniteuthis portieri, also known as Joubin's squid from the monotypic family Joubiniteuthidae and genus Joubiniteuthis. It is a rare, small squid which occurs in the mesopelagic to bathypelagic zones and which has a worldwide distribution in tropical and subtropical regions. It is a distinctive squid having long arms I-III which have numerous small suckers in six rows. Its biology is little known and it is thought that it stays in the depths of the ocean with its arms outstretched waiting for small animals to ensnare after they have accidentally swum into the arms. This species is named after Louis Joubin, a French zoologist. It is known to reach a mantle length of 9 cm.
It is thought to be the closest relative of the bizarre, famous bigfin squids (genus Magnapinna). The Joubin’s squid has been sighted most recently by Schmidt Ocean Institute, but was first found at the northwest Hawaiian islands on a 2003 NOAA (National Oceanic And Atmospheric Administration) expedition which was first believed to be one of if not the best pieces of footage of the squid in its natural habitat.
- Barratt, I.; Allcock, L. (2014). "Joubiniteuthis portieri". IUCN Red List of Threatened Species. 2014: e.T162961A958314. doi:10.2305/IUCN.UK.2014-1.RLTS.T162961A958314.en. Retrieved 18 November 2021.
- Julian Finn (2016). "Joubiniteuthis portieri (Joubin, 1916)". World Register of Marine Species. Flanders Marine Institute. Retrieved 7 March 2018.
- Richard E. Young (2016). "Joubiniteuthidae Naef, 1922, Joubiniteuthis Berry 1920. Joubiniteuthis portieri Joubin, 1916. Version 29 August 2016". The Tree of Life Web Project.
- Fernández-Álvarez, Fernando Ángel; Taite, Morag; Vecchione, Michael; Villanueva, Roger; Louise, Allcock. "A phylogenomic look into the systematics of oceanic squids". academic.oup.com. doi:10.1093/zoolinnean/zlab069. Retrieved 2023-04-08.
- "CephBase: Joubiniteuthis portieri". Archived from the original on 2005-08-17.
- Tree of Life web project: Joubiniteuthis portieri