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Home Environment

Spinner Dolphin

July 1, 2021
in Environment
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Spinner Dolphin
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In news- A four-feet-long male Spinner dolphin (Stenella longirostris) carcass was washed ashore in Odisha’s Paradip town within the Bhitarkanika National Park.

About the Spinner Dolphins-

  • They are small cetaceans with a slim build and member of the family Delphinidae of toothed whales.
  • This species has an elongated rostrum and a triangular or sub-triangular dorsal fin.
  • They are found in off-shore tropical waters around the world. 
  • It is famous for its acrobatic displays in which it spins along its longitudinal axis as it leaps through the air. 
  • It is sometimes referred to as the long-snouted dolphin to distinguish it from the similar Clymene dolphin, which is often called the short-snouted spinner dolphin. 
  • The species was described by John Gray in 1828. 
  • It is included in Schedule I of the Wild Life (Protection) Act, 1972 and in Appendix I of the Convention on International Trade in Endangered Species and in Appendix II of the Convention on Migratory Species. 
  • It is categorised as ‘Data deficient’ on the IUCN Red List.
  • Though the species primarily inhabits coastal waters, islands, banks, in the eastern tropical Pacific, they live far from shore.
  • The four subspecies are:
  • Eastern spinner dolphin (S. l. orientalis) from the tropical eastern Pacific.
  • Central American or Costa Rican spinner dolphin (S. l. centroamericana) also found in the tropical eastern Pacific.
  • Gray’s or Hawaiian spinner dolphin (S. l. longirostris), from the central Pacific Ocean around Hawaii.
  • Dwarf spinner dolphin (S. l. roseiventris), first found in the Gulf of Thailand.
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Source: DownToEarth
Tags: News PaperPrelims

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