night shark
Carcharhinus signatus (Poey, 1868)
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
The night shark (Carcharhinus signatus) is a species of requiem shark, in the family Carcharhinidae, found in the temperate and tropical waters of the Atlantic Ocean. An inhabitant of the outer continental shelf and upper continental slope, this shark most commonly occurs at depths of 50–600 m (160–1,970 ft) and conducts a diel vertical migration, spending the day in deeper water and moving into shallower waters at night. Off northeastern Brazil, large numbers congregate around seamounts of varying depths. A slender, streamlined species, the night shark typically reaches a length of 2 m (6.6 ft). It can be identified by its long, pointed snout and large, green eyes (when alive), and is dark grayish blue or brown above and white below. Night sharks are quick, nocturnally active, schooling predators that feed mainly on small bony fishes and squid. Reproduction is viviparous as with the other members of its family; females mate during the summer and give birth to litters of usually 12–18 pups after a gestation period of a year.
Wikipedia contributors, Night shark; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T02:54:22.110467+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Carcharhinus signatus (Poey, 1868)
- Name authority
- (Poey, 1868)
- Common name
- night shark
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Elasmobranchii
- Order
- Carcharhiniformes
- Family
- Carcharhinidae
- Genus
- Carcharhinus
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: yes · Freshwater: no · Terrestrial: no. These do not form a complete habitat description.
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumChondrichthyes
- classElasmobranchii
- subclassNeoselachii
- infraclassSelachii
- superorderGaleomorphi
- orderCarcharhiniformes
- familyCarcharhinidae Jordan & Evermann, 1896
- genusCarcharhinus Blainville, 1816
- speciesCarcharhinus signatus (Poey, 1868)
Close classified relatives
These entries share the source’s genus, Carcharhinus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Carcharhinus leiodon Garrick, 1985 | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| Carcharhinus fitzroyensis (Whitley, 1943) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| hardnose sharkCarcharhinus macloti (Müller & Henle, 1839) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| Carcharhinus obsoletus White, Kyne & Harris, 2019 | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| finetooth sharkCarcharhinus isodon (Valenciennes, 1839) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| blacknose sharkCarcharhinus acronotus (Poey, 1860) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| silvertip sharkCarcharhinus albimarginatus (Rüppell, 1837) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| Carcharhinus cautus (Whitley, 1945) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| Carcharhinus cerdale Gilbert, 1898 | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| Carcharhinus coatesi (Whitley, 1939) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| whitecheek sharkCarcharhinus dussumieri (Müller & Henle, 1839) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
| Galapagos sharkCarcharhinus galapagensis (Snodgrass & Heller, 1905) | CarcharhinidaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Hypoprion signatus Poey, 1868 Poey, 1868 | synonym |
| Hypoprion bigelowi Cadenat, 1956 Cadenat, 1956 | synonym |
| Hypoprion longirostris Poey, 1876 Poey, 1876 | synonym |
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://www.marinespecies.org/aphia.php?p=taxdetails&id=105798 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:R3QK. Classification follows source parent identifiers. English common names may vary by region.