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Blind Cave Tetra or Astyanax jordiani OdySea Aquarium Astyanax jordani,Astyanax jordiani,Geotagged,United States,Winter Click/tap to enlarge PromotedSpecies introCountry intro

    comments (5)

  1. Great image. Are you into cave diving now,William. Be careful. Posted 10 days ago
    1. It seems unnatural but there is a large aquarium in Scottsdale, Arizona located in the Sonoran Desert. In three months the temperatures can easily reach 100+ degrees F. Posted 10 days ago
  2. Amazing how it's not just blind, but lacks eyes altogether. Posted 10 days ago
    1. Additional information about this this fish says that the pigmentation and eyes have degenerated over generations due to the high energy cost of maintaining eye tissues which they do not need in the dark cave system. It stated that the vertebrate retina is one of the most energy expensive tissues, with an metabolism's passing that of even the brain. To compensate for the loss of eyes, this fish has evolved a larger jaw, a higher number of taste buds and higher number of teeth in order to be more efficient finding food. Posted 10 days ago
      1. Wonderful educational comment, thank you William! Posted 10 days ago

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"Astyanax jordani" is a freshwater fish of the characin family of order Characiformes, native to Mexico. It is sometimes called the cave tetra, or by its local Spanish name "tetra ciego".

Similar species: Characins And Allies
Species identified by William Bodine
View William Bodine's profile

By William Bodine

All rights reserved
Uploaded Mar 17, 2023. Captured Mar 16, 2023 13:16 in 9500 East Vía de Ventura, Scottsdale, AZ 85250, USA.
  • Canon EOS 70D
  • f/4.0
  • 1/10s
  • ISO4000
  • 45mm