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Grey reef shark

Carcharhinus amblyrhynchos

  • Sharks and rays
  • IUCN: Endangered
  • Usual depth3–18 m
  • Water temperature24–30 °C
  • How commonCommon
All species

Photo credit: (c) cello caruso-turiello, some rights reserved (CC BY) · CC BY · iNaturalist

About this species

The grey reef shark or gray reef shark is a species of requiem shark, in the family Carcharhinidae. One of the most common reef sharks in the Indo-Pacific, it is found as far east as Easter Island and as far west as South Africa. This species is most often seen in shallow water near the drop-offs of coral reefs. It has the typical "reef shark" shape, with a broad, round snout and large eyes. It can be distinguished from similar species by the plain or white-tipped first dorsal fin, the dark tips on the other fins, the broad, black rear margin on the tail fin, and the lack of a ridge between the dorsal fins. Most individuals are less than 1.88 m (6.2 ft) long.

Text from the Wikipedia article “Grey reef shark”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

  • January: 2,461 records
  • February: 2,382 records
  • March: 2,994 records
  • April: 2,971 records
  • May: 2,717 records
  • June: 2,572 records
  • July: 2,565 records
  • August: 2,600 records
  • September: 2,615 records
  • October: 2,744 records
  • November: 2,361 records
  • December: 2,540 records

Depth and water temperature

Depth

Mostly recorded at 3–18 m · Deepest record: 255 m

  • 0–10 m: 9,444 records
  • 10–20 m: 12,832 records
  • 20–30 m: 922 records
  • 30–40 m: 244 records
  • 40–50 m: 1 records
  • 50–60 m: 2 records
  • 60–70 m: 1 records
  • 70–80 m: 0 records
  • 80–90 m: 1 records
  • 90–100 m: 0 records
  • 100–110 m: 0 records
  • 110+ m: 2 records

Water temperature

Recorded in surface water of 24–30 °C

  • 24–26 °C: 505 records
  • 26–28 °C: 174 records
  • 28–30 °C: 287 records

Names and classification

English
Grey reef shark, blacktail reef shark, Gray Reef Shark, grey reef shark, Grey Shark, Blacktail reef shark, Grey reef shark, shortnose blacktail
Names in 2 more languages
French
Dagsit, Requin Gris de récif, Requin gris de récif, Requin dagsit, Requin à queue noire
Japanese
Oguromejirozame, オグロメジロザメ

Other scientific names: Carcharhinus amblyrhinchos, Carcharhinus amblyrhynchus, Carcharhinus wheeleri, Carcharias amblyrhynchos, Carcharias nesiotes, Carcharinus amblyrhynchos, Carcharinus amblyrhynchus, Carcharinus amblyrhyncus, Galeolamna coongoola, Galeolamna fowleri, Galeolamna tufiensis

Similar species

Sources and credits

Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).

  • Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
  • Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
  • Conservation status as published by GBIF (IUCN Red List).
  • 217,173 open-data records from 1856 to 2021.
  • Species data updated October 26, 2026.

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