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Milk shark

Rhizoprionodon acutus

  • Sharks and rays
  • IUCN: Vulnerable
  • Usual depth3–69 m
  • Water temperature20–30 °C
  • Best monthsMay
  • How commonOccasional
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About this species

The milk shark is a species of requiem shark, and part of the family Carcharhinidae, whose common name comes from an old Indian belief that consumption of its meat promotes lactation. The largest and most widely distributed member of its genus, the milk shark typically measures 1.1 m (3.6 ft) long, and can be found in coastal tropical waters throughout the eastern Atlantic and the Indo-Pacific regions. Occurring from the surface to a depth of 200 m (660 ft), this species is common near beaches and in estuaries, and has been recorded swimming up rivers in Cambodia. Juveniles are known to inhabit tidal pools and seagrass meadows. The milk shark has a slender body with a long, pointed snout and large eyes, and is a nondescript gray above and white below. This shark can be distinguished from similar species in its range by the long furrows at the corners of its mouth, and seven to 15 enlarged pores just above them.

Text from the Wikipedia article “Milk 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: 19 records
  • February: 21 records
  • March: 42 records
  • April: 38 records
  • May: 142 records
  • June: 58 records
  • July: 18 records
  • August: 36 records
  • September: 41 records
  • October: 67 records
  • November: 63 records
  • December: 60 records

Depth and water temperature

Depth

Mostly recorded at 3–69 m · Deepest record: 740 m

  • 0–10 m: 104 records
  • 10–20 m: 28 records
  • 20–30 m: 30 records
  • 30–40 m: 16 records
  • 40–50 m: 16 records
  • 50–60 m: 54 records
  • 60–70 m: 32 records
  • 70–80 m: 8 records
  • 80–90 m: 2 records
  • 90–100 m: 9 records
  • 100–110 m: 3 records
  • 110+ m: 6 records

Water temperature

Recorded in surface water of 20–30 °C

  • 18–20 °C: 1 records
  • 20–22 °C: 1 records
  • 22–24 °C: 59 records
  • 24–26 °C: 30 records
  • 26–28 °C: 49 records
  • 28–30 °C: 33 records

Names and classification

English
Milk shark, Fish-shark, Fish Shark, Grey dog shark, Little Blue Shark, Longman's Dogshark, Longmans Dogshark, Longman's Shark, milk shark, Milk Shark, Sharp-nosed milk shark, Walbeehm's sharp-nosed shark, White-eyed Shark, White-eye Shark
Names in 6 more languages
German
Milchhai, Scharfnasenhai
Spanish
Cazón lechero, Cazón lechoso, Cazón picudo, tiburón lechoso
French
Requin à museau pointu, Requin à nez pointu
Japanese
Hiragashira, ヒラガシラ
Thai
ปลาฉลามปากแหลม
Simplified Chinese
尖吻斜鋸牙鯊, 尖頭曲齒鮫, 尖頭曲齒鯊, 尖頭沙, 沙條

Other scientific names: Carcharhinus acutus, Carcharias aaronis, Carcharias acutus, Carcharias crenidens, Carcharias eumeces, Carcharias sorrahkowah, Carcharias sorrakowah, Carcharias walbeehmi, Carcharias walbeehmii, Carcharias walbenii, Cynocephalus acutus, Hypoprion acutus, Scoliodon acutus, Scoliodon longmani, Scoliodon palasorra, Scoliodon palasorrah, Scoliodon sorrahkowah, Scoliodon vagatus, Scoliodon walbeehmi, Scoliodon walbeehmii, Scoliodon walbeemii, Scolliodon walbechmii, Squalus sorrakowah

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).
  • 964 open-data records from 1837 to 2023.

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