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Sandbar shark

Carcharhinus plumbeus

Familia: Carcharhinidae | Género: Carcharhinus

Sandbar shark (Carcharhinus plumbeus)

Sandbar shark

Carcharhinus plumbeus

Familia: Carcharhinidae | Género: Carcharhinus

Marine environment | Carnivorous | Primarily nocturnal | Atlantic, Indian and Pacific Oceans | Up to 3 metres

The sandbar shark (Carcharhinus plumbeus), also known as the brown shark, is one of the most characteristic shark species of tropical marine ecosystems. Its name refers to its distinctive, uniform grey colouring, with a paler underside—an adaptation that enables effective camouflage both from above and from the seabed.

It is distinguished by its large, tall, triangular first dorsal fin, as well as the darker edges on several of its fins. Although it can reach up to 3 metres in length, individuals typically measure between 2 and 2.5 metres, making it a prominent predator within reef ecosystems.

Geographic distribution

The sandbar shark has a near-cosmopolitan distribution, inhabiting tropical and temperate waters across the world’s major oceans:

  • Western Atlantic: southern Massachusetts (United States) to Argentina; also the Gulf of Mexico, the Bahamas, Cuba, and the southern and western Caribbean.
  • Eastern Atlantic: from Portugal to the Democratic Republic of the Congo, including the Mediterranean Sea.
  • Indo-Pacific: scattered records from the Red Sea, the Persian Gulf and East Africa to the Hawaiian Islands.
  • Eastern Pacific: Revillagigedo Islands and the Galápagos Islands.
Sandbar shark (Carcharhinus plumbeus)
Sandbar shark
Carcharhinus plumbeus

Icono de Anfibios Habitat

The sandbar shark is a coastal, neritic species closely associated with continental and insular shelves. It prefers relatively shallow waters, generally from the surface down to around 280 metres, although it can occasionally be found at greater depths. It is commonly found in:

  • Sandy areas and mixed seabeds
  • Bays, estuaries, and river mouths
  • Coastal zones near ports with abundant prey

It undertakes seasonal migrations, typically linked to water temperature and food availability.

Icono de Anfibios Lifestyle and behaviour

Although active during the day, it is more active at night, feeding on cephalopods such as squid and octopus, as well as crustaceans including crabs and shrimps. The sandbar shark is an active predator, with peak feeding activity at dusk and during the night, using stealth and speed to capture its prey.

Social behaviour:

It lives in small groups, with populations segregated by age. Members of each group are organised within a well-defined hierarchy.

Daily activity:

It hunts by ambush and forms part of the top predator group within its ecological niche. Opportunistic by nature, it will readily attack any smaller animal within reach.

Reproduction:

The sandbar shark is viviparous and reproduces every two to three years.

  • In the Northern Hemisphere, mating occurs between May and June.
  • In the Southern Hemisphere, between October and January.

Gestation lasts around 12 months, after which the female gives birth to between 1 and 14 pups, measuring 56 to 75 cm at birth. Sexual maturity is reached at lengths between 140 and 190 cm.

Relationship with its environment:

Although not a territorial species, it may display signs of aggression towards other species.

Icono de Anfibios Diet

In the wild

  • Medium-sized bony fish (sardines, horse mackerel, mackerel)

  • Cephalopods such as squid and octopus

  • Rays and other small elasmobranchs

  • Benthic crustaceans in coastal areas (crabs, lobsters)

  • Occasionally carrion, reflecting opportunistic feeding behaviour

Under human care

  • Varied and controlled diet, provided in three feedings per week

  • Based on white fish (hake), oily fish (herring), and cephalopods (squid), ensuring full nutritional intake

  • Feeding adjusted according to the individual’s age, size, and activity level

Icono de Anfibios Conservation status

Lista roja IUCN Rana arborícola verde (Litoria Caerulea)

The sandbar shark (Carcharhinus plumbeus) is classified as Endangered (EN) on the IUCN Red List. Its population is declining globally, particularly in regions with high fishing pressure.

Although widely distributed in tropical and subtropical waters, its low reproductive rate, combined with human activity, hinders population recovery.

Main threats:

  • Commercial and artisanal fishing: one of the most commonly caught shark species worldwide, both intentionally and as bycatch. Its meat and, especially, its fins are of high commercial value.

  • Overfishing and illegal fishing: international demand for shark fins has led to overexploitation in many areas, exceeding the species’ natural recovery capacity.

  • Habitat degradation: the alteration of coastal areas such as bays, estuaries, and nursery grounds—due to urban development, pollution, and port activity—directly impacts juveniles and pregnant females.

  • Low reproductive rate: the species takes several years to reach sexual maturity and has long gestation periods, making populations particularly vulnerable to sustained exploitation.

Related species

Bull shark

Blacktip reef shark

Whitetip reef shark