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Longtail torpedo ray

6/11/2018

 
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Source: CSIRO National Fish Collection.
The Longtail Torpedo Ray (Tetronarce tokionis) is a small dark grey-brown electric ray with leathery skin. They occur in the subtropical, north-west Pacific (think Australia, Japan, Taiwan and New Zealand). Around Taiwan, the species has been confused with T. formosa Haas & Ebert, 2006. Here they are observed on the continental shelf and slope over rocky, sandy or muddy bottoms.
Males will mature before they are 67.5 cm total length (TL) and the females are larger. At birth they are about 20 cm TL. An uncommon animal, they can get down to 220–1,100 meters in Japan, and around 410–735 meters in Australia. Caught as bycatch in trawl and gillnet fisheries and sometimes seen in fish markets; the ray can also be used as fishmeal. The IUCN has assessed these animals as Data Deficient (DD) until its taxonomy and distribution are better understood.

EVER HEARD OF THIS ray?

GLOSSARY

  • Bycatch: The part of a fishery’s catch that is made up of non-target species. 
  • Commercial fishery: The activity of catching fish and other seafood for profit.
  • Continental slope: The steep slope from a continental shelf to the ocean floor; usually around 20 km (12.4 miles) wide and made up of mud and silt substrate. ​​
  • IUCN: International Union for Conservation of Nature.​

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    Author

    TFUI Founder Melissa C. Marquez is author of all animal bios and "Behind the Fins" segments.
    ​
    A proud #LatinainSTEM, Marquez is a marine biologist who focuses on shark habitat use and movements; she is also a science communicator (follow her on Twitter) who focuses on diverse Chondrichthyan education and who focuses on the media coverage of sharks.
    You can learn more about her on her website.

    SEE MELISSA'S TEDx TALK HERE:

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  • About TFUI
    • TFUI Origins >
      • About TFUI Founder Melissa
      • TFUI Officers
    • Take a Bite
    • Get Involved
    • FAQ
  • Bite Blog
  • Education
    • The Sharks >
      • Shark Anatomy
    • The Skates & Rays
    • The Chimaeras
    • Why Environments Matter
    • The Threats
    • Open Access >
      • Behind the Fins: Interview series
      • Bite into Research
      • Shark Bites: Book Recommendations
      • Sustainable Seafood Apps
  • Fins United
    • Shark Party Ideas
    • Little Fins Nursery
    • Big Fins Reef
  • Contact