Notoscopelus caudispinosus

Notoscopelus caudispinosus is a species of lanternfish in the family Myctophidae. It is found in the eastern and western Atlantic Ocean, the Indian Ocean and parts of the Pacific Ocean. It spends the day below 1,000 m (3,300 ft), rising towards the surface to feed at night.

Notoscopelus caudispinosus

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Myctophiformes
Family: Myctophidae
Genus: Notoscopelus
Species:
N. caudispinosus
Binomial name
Notoscopelus caudispinosus
(Johnson, 1863) [2]
Synonyms[2]
  • Lampanyctus caudospinosus (Johnson, 1863)
  • Macrostoma caudospinosum (Johnson, 1863)
  • Notoscopelus (Notoscopelus) caudispinosus (Johnson, 1863)
  • Scopelus caudispinosus Johnson, 1863

Description

Notoscopelus caudispinosus has a laterally compressed head and body with a maximum length of about 140 mm (5.5 in). The mouth is at the tip of the rounded snout and extends backwards to just behind the eye. The teeth are small. There are 24 to 27 soft rays in the dorsal fin, 19 to 21 in the anal fin and 11 to 13 in the pectoral fins. There are groups of photophores (small light organs) on the head and sides of the body. Above the caudal peduncle there is a row of eight to nine luminous scale-like segments in adult males, but male fish lack luminous organs above the eye and on the cheek.[3] N. caudispinosus differs from closely related species in having fewer than 15 gill rakers.[4]

Distribution

This species has a wide oceanic distribution in deep water habitats. It is found in the eastern Atlantic Ocean between the equator and about 35°N, but is absent from the Gulf of Guinea and the upswelling region off the coast of Mauritania. It is also present in the western Atlantic, between about 39°S and 41°N, in the Caribbean Sea and the Gulf of Mexico, and in parts of the Indian and Pacific Oceans.[1] It typically spends the day at depths greater than 1,000 m (3,300 ft), rising through the water column at night to feed in the top 175 m (570 ft), where it is most abundant between 60 and 125 m (200 and 410 ft).[5]

Status

N. caudispinosus faces no particular threats and has a widespread distribution, so the International Union for Conservation of Nature has rated it as being a least-concern species.[1]

gollark: Hunting rifle no, and I may not actually have ever seen one in person, bow and arrow yes, I said so.
gollark: Also not a crossbow. Although I did fire a non-cross bow at some point.
gollark: No. Like I said, it never came up, this being the united kingdom™, which does not like guns™.
gollark: Also running `optipng` over some image files I had, which can mildly reduce their size.
gollark: Neither, unless you count "running imagemagick" as A.

References
  1. Hulley, P. (2015). "Notoscopelus caudispinosus". IUCN Red List of Threatened Species. 2015: e.T15601865A15603875. doi:10.2305/IUCN.UK.2015-4.RLTS.T15601865A15603875.en.
  2. Bailly, Nicolas (2015). "Notoscopelus caudispinosus (Johnson, 1863)". WoRMS. World Register of Marine Species. Retrieved 21 March 2016.
  3. Smith, Margaret M.; Heemstra, Phillip C. (2012). Smiths' Sea Fishes. Springer Science & Business Media. pp. 282, 315. ISBN 978-3-642-82858-4.
  4. Nafpaktitis, Basil G. (1975). "Review of the Lanternfish Genus Notoscopelus (Family Myctophidae) in the North Atlantic and the Mediterranean". Bulletin of Marine Science. 25 (1): 75–87.
  5. "Notoscopelus caudispinosus". Fishes of the NE Atlantic and the Mediterranean. Marine Species Identification Portal. Retrieved 22 March 2016.
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