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Rouleina attrita
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Alepocephaliformes
Family:	Alepocephalidae
Genus:	Rouleina
Species:	R. attrita
Binomial name
Rouleina attrita (Vaillant, 1888)
Synonyms
Bathytroctes aequatoris Goode & Bean, 1896 Bathytroctes attritus Vaillant, 1888 Bathytroctes mollis Köhler, 1896 Caudania mollis Köhler, 1896 Rouleina attritus Vaillant, 1888 Rouleina mollis Köhler, 1896 Talismania mollis Köhler, 1896

Rouleina attrita, the softskin smooth-head or softskin slickhead, is a species of fish in the family Alepocephalidae.

Its specific name is from the Latin attrīta ("bruised, worn away"), presumably referring to the mutilated or decomposed state of the type specimens.

Description

Rouleina attrita is black, measuring up to 42 cm (17 in). Its upper jaw reaches to behind the eye, and it has a lateral line of 43–48 photophores. It has 43–46 vertebrae. Its scales are deciduous and its skin contains small fluid-filled compartments. Its eyes contain convexiclivate temporal foveae containing densely packed ganglia.

Habitat

Rouleina attrita is engybenthic or bathypelagic, meaning that it swims near the seafloor, living at depths of 450–2,300 m (1,480–7,550 ft). It has been recorded in all non-polar seas.

Behaviour

Its testes are ribbon-like, in convoluted folds but never in discrete lobes. Its eggs are large, up to 3.2 mm (0.13 in) in diameter.

References

1. Hulley, P. (2015). "Rouleina attrita". IUCN Red List of Threatened Species. 2015: e.T15149121A15149143. doi:10.2305/IUCN.UK.2015-4.RLTS.T15149121A15149143.en. Retrieved 7 October 2024.
2. Bailly, Nicolas (2008). "Rouleina attrita (Vaillant, 1888)". WoRMS. World Register of Marine Species.
3. "Rouleina attrita". fishesofaustralia.net.au.
4. Collin, Shaun P.; Marshall, N. Justin (April 8, 2008). Sensory Processing in Aquatic Environments. Springer Science & Business Media. ISBN 9780387226286 – via Google Books.
5. Christopher Scharpf & Kenneth J. Lazara (10 March 2024). "Family ALEPOCEPHALIDAE Bonaparte 1846 (Slickheads)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 7 October 2024.
6. Smith, Margaret M.; Heemstra, Phillip C. (December 6, 2012). Smiths' Sea Fishes. Springer Science & Business Media. ISBN 9783642828584 – via Google Books.
7. Nations, Food and Agriculture Organization of the United (August 1, 2020). Identification guide to the mesopelagic fishes of the central and south east Atlantic Ocean. Food & Agriculture Org. ISBN 9789251330944 – via Google Books.
8. "Fishery Bulletin". National Marine Fisheries Service. October 9, 1978 – via Google Books.
9. McEachran, John; Fechhelm, Janice D. (June 17, 2013). Fishes of the Gulf of Mexico, Vol. 1: Myxiniformes to Gasterosteiformes. University of Texas Press. ISBN 9780292757059 – via Google Books.
10. Cronin, Thomas W.; Johnsen, Sönke; Marshall, N. Justin; Warrant, Eric J. (August 10, 2014). Visual Ecology. Princeton University Press. ISBN 9780691151847 – via Google Books.
11. "Sport Fishery Abstracts". Department of the Interior, U.S. Fish and Wildlife Service. October 9, 1978 – via Google Books.
12. Froese, Rainer; Pauly, Daniel (eds.). "Rouleina attrita". FishBase.
13. "Marine Species Identification Portal : Softskin smooth-head - Rouleina attrita". species-identification.org.

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• IUCN Red List least concern species
• Rouleina
• Fish described in 1888
• Taxa named by Léon Vaillant
• Ray-finned fish stubs