Softskin smooth-head

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Softskin smooth-head
Rouleina attrita.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Alepocephaliformes
Family: Alepocephalidae
Genus: Rouleina
Species:
R. attrita
Binomial name
Rouleina attrita
(Vaillant, 1888)
Synonyms [2]
  • Bathytroctes aequatorisGoode & Bean, 1896
  • Bathytroctes attritusVaillant, 1888
  • Bathytroctes mollisKöhler, 1896
  • Caudania mollisKöhler, 1896
  • Rouleina attritusVaillant, 1888
  • Rouleina mollisKöhler, 1896
  • Talismania mollisKöhler, 1896

The softskin smooth-head (Rouleina attrita), also called the softskin slickhead, is a species of fish in the family Alepocephalidae. [3] [4]

Contents

Its specific name is from the Latin attrīta ("bruised, worn away"), presumably referring to the mutilated or decomposed state of the type specimens. [5]

Description

The softskin smooth-head is black, measuring up to 42 cm (17 in). [6] Its upper jaw reaches to behind the eye, and it has a lateral line of 43–48 photophores. [7] It has 43–46 vertebrae. [8] Its scales are deciduous and its skin contains small fluid-filled compartments. [9] Its eyes contain convexiclivate temporal foveae containing densely packed ganglia. [10]

Habitat

The softskin smooth-head 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. [11] [12]

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. [13]

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References

  1. ↑ Museum), Percy (Butch) Hulley (South Africa (July 11, 2012). "IUCN Red List of Threatened Species: Rouleina attrita". IUCN Red List of Threatened Species– via www.iucnredlist.org.
  2. ↑ "WoRMS - World Register of Marine Species - Rouleina attrita (Vaillant, 1888)". www.marinespecies.org.
  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 – via Google Books.
  5. ↑ "Order ALEPOCEPHALIFORMES (Slickheads)". December 29, 2016.
  6. ↑ Smith, Margaret M.; Heemstra, Phillip C. (December 6, 2012). "Smiths' Sea Fishes". Springer Science & Business Media – 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. – 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 – via Google Books.
  10. ↑ Cronin, Thomas W.; Johnsen, Sönke; Marshall, N. Justin; Warrant, Eric J. (August 10, 2014). "Visual Ecology". Princeton University Press – via Google Books.
  11. ↑ "Sport Fishery Abstracts". Department of the Interior, U.S. Fish and Wildlife Service. October 9, 1978 – via Google Books.
  12. ↑ "Rouleina attrita, Softskin smooth-head". www.fishbase.se.
  13. ↑ "Marine Species Identification Portal : Softskin smooth-head - Rouleina attrita". species-identification.org.
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