Shark Projects
Learn about sharks
All about sharks
Shark protection projects
Projects

Photo © Alexa Elliot

Photo © Alexa Elliot

Photo © Alexa Elliot

Learn about sharks

For example where and when they migrate

For example where and when they migrate

For example where and when they migrate

Photo © Guy Harvey Research Institute

Photo © Guy Harvey Research Institute

Photo © Guy Harvey Research Institute

Shark projects
We support research and public outreach projects

Photo © Matt Potensky

Photo © Matt Potensky

Photo © Matt Potensky

previous arrow
next arrow

The shark species "Night shark"

Photo
Unfortunately, there is not yet a photo of this shark in the database
Unfortunately, there is not yet a photo of this shark in the database
Range Map
North America South America Africa Australia Europe Asia Coming soon Coming soon
North America South America Africa Australia Europe Asia Coming soon Coming soon
Night shark

Rough area of distribution

Taxonomy
Kingdom:
Animals (Animalia)
Phylum:
Vertebrates (Chordata)
Class:
Cartilagenous fishes (Chondrichthyes)
Order:
Ground sharks (Carcharhiniformes)
Family:
Requiem sharks (Carcharhinidae)
Genus:
Carcharhinus
Names
Scientific:
Carcharhinus signatus
English:
Night shark
German:
Nachthai
French:
Requin de nuit
Spanish:
Tiburón nocturno
Appearance
Large requiem shark with long and pointed snout. Circular eyes (diameter 1.8 to 2.7 % of total body length). Small gill slits (height only about 2.5 % of total body length). First dorsal fin is small and triangular with origin over the free rear tips of pectorals. Second dorsal fin is small and low (height about 1.7 to 2.1 % of total body length) with origin over or slightly posterior to origin of anal fin. Pectoral fins slightly falcate, moderately long with narrow rounded apices. Interdorsal ridge present.
Coloration
Grey upper body, white ventral surface. No conspicuous markings. Sometimes has small black spots scattered over the body and an inconspicuous white band can be present over the flank.
Distribution
Western Atlantic: Delaware to Florida, Bahamas, Cuba, southern Brazil and Argentina. Eastern Atlantic: Senegal to Ivory Coast, Ghana to Cameroon, Zaire and Angola. Eastern Pacific: probably off Panama.
Biology
A common species of coastal and semi-oceanic deeper waters. Lives preferably at the outer edges of the continental shelves. Prefers depths between 50 to 100 m but has been seen at the surface, and caught in 200 m depth (may even be caught in depths of 600 m). Apparently a schooling species.
Diet
Feeds on small fishes, and some squid.
Size
Maximum about 280 cm, average size between 200 and 250 cm.
Reproduction
Viviparous, with yolksac placenta 4 to 12 pups per litter. Size at birth about 60 cm, females reach sexual maturity with a size of about 180 cm.
Similar Species
Several requiem sharks have a similar appearance and taxonomic features should be used to clearly distinguish among them.
Vulnerability
Category: Endangered (EN)
Criteria: A2bd
Last evaluated: 2021
Trend: Decreasing




© IUCN Red List 2024. The IUCN Red List of Threatened Species: Version 2024-2.

Danger to Humans
Harmless.

Support the Shark Foundation in its work to protect sharks.