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Betta Trading
  • Home
    • Map
    • Indices
    • Pets as Presents
    • Artificial Colours in Food
    • Piviacy policy
    • Quokkas
    • Quolls
    • A I
      • Fires in EVs
  • Poultry
    • Hormones in Poultry Food and Mad Cow Diseasein Australia
    • Protein in Chook Food
    • Lucky Layer
    • Coccidiosis
    • Golden Yolk
    • Laucke Poultry foods
      • XTRA EGG 17
      • Duck and Goose Starter
      • Red Hen 17
      • Showbird Breeder
      • Gamebird Breeder
      • Red Hen Free Range Layer
      • Red Hen Layer
      • Ren Hen Scratch Grain Mix
      • Chick Starter
      • Red Hen Chick
      • Pullet Grower MP
  • Bird Seed
    • Parrot Mix
  • Dog Food
    • Uncle Albers
    • Great Barko
    • Drover
    • Black Hawk
      • Black Hawk Lamb and Rice adult dog food
      • Black Hawk Chicken and Rice Adult dog food
      • Black Hawk Working Dog Food
    • Dog Books
    • Cobber
      • Cobber Working Dog
  • Cat food
    • Cats
    • True Blue Cat Food
  • Misc.
  • Plants
    • Water Plants
      • Duckweed
      • Azolla
        • Azolla Event
      • Ludwigia repens
    • Rapid Raiser
    • Jerusalem Artichokes
    • Scarlet Runner Beans
    • Plant books
      • Organic Gardening books
      • Robert Pavlis Books
      • Container gardening books.
      • Ruth Stout Books
    • Belladonna Lilies
  • Books
    • Steve's books
      • Tetras
      • Andy Brown Stories
    • Luna's Books
    • Richard F. Challis's books
    • Robert Challis Books
    • Free Comics
    • Free Best sellers
  • Fish
    • Tetras
      • Emperor Tetra
      • Neon Tetra
      • Evolution or Creation of the Blind Cave Fish
    • Live Bearers
      • Mosquito Fish
      • Guppies
      • Swordtail
      • Platies
      • Mollies
      • Endlers Guppy
    • Danios and White Clouds
      • White Cloud Mountain Minnow
      • Zebra Danios
      • Queen Danio
    • Australasian Fish
      • River Murray Rainbowfish
      • Southern Pygmy Perch
      • Lake Eacham Rainbowfish
      • Red Rainbowfish
    • Why Fish Don't Exist.
    • Fish Facts and Myths
      • Viruses
      • Chlorine and chloramine
      • Dyed Fish
      • Oxygen and Fish
      • White Spot Disease
    • Barbs
      • Arulius Barb, Puntius Arulius
      • Black Ruby Barb
      • Cherry Barb
      • Tiger Barb
      • Rosy Barb
      • Odesa Barb
      • Tinfoil Barb
      • Gold Barb
      • Five Banded Barb
      • Spanner Barb
    • Sharks
      • Silver Shark
      • Red Tail Black Shark
      • Great White Shark
      • Black Shark
    • Catfish and Loaches
      • Bristlenose Catfish
      • Algae Eater
      • Kuhli Loaches
      • Black Kuhli Loach
      • Reticulate Loach
      • Phantom Glass Catfish
    • Goldfish
    • Fish Food
      • Feedwell Fish Food
      • Colour Enhancing Fish Food
      • Bloodworms
    • Bettas & their Relatives
      • Blue Gourami
      • Dwarf Gouramis
      • Honey Dwarf Gourami
      • Paradise Fish
      • Pearl Gourami
    • Coexisting with Fish
      • Hydras
    • Turtle Keeping
  • Space
    • Comets
    • Deinococcus radiodurans
    • First Animals in Space
    • Andromeda Galaxy
    • Lichens
    • Single Species Ecosystem?
    • Tiffany Rat
  • More
    • Home
      • Map
      • Indices
      • Pets as Presents
      • Artificial Colours in Food
      • Piviacy policy
      • Quokkas
      • Quolls
      • A I
        • Fires in EVs
    • Poultry
      • Hormones in Poultry Food and Mad Cow Diseasein Australia
      • Protein in Chook Food
      • Lucky Layer
      • Coccidiosis
      • Golden Yolk
      • Laucke Poultry foods
        • XTRA EGG 17
        • Duck and Goose Starter
        • Red Hen 17
        • Showbird Breeder
        • Gamebird Breeder
        • Red Hen Free Range Layer
        • Red Hen Layer
        • Ren Hen Scratch Grain Mix
        • Chick Starter
        • Red Hen Chick
        • Pullet Grower MP
    • Bird Seed
      • Parrot Mix
    • Dog Food
      • Uncle Albers
      • Great Barko
      • Drover
      • Black Hawk
        • Black Hawk Lamb and Rice adult dog food
        • Black Hawk Chicken and Rice Adult dog food
        • Black Hawk Working Dog Food
      • Dog Books
      • Cobber
        • Cobber Working Dog
    • Cat food
      • Cats
      • True Blue Cat Food
    • Misc.
    • Plants
      • Water Plants
        • Duckweed
        • Azolla
          • Azolla Event
        • Ludwigia repens
      • Rapid Raiser
      • Jerusalem Artichokes
      • Scarlet Runner Beans
      • Plant books
        • Organic Gardening books
        • Robert Pavlis Books
        • Container gardening books.
        • Ruth Stout Books
      • Belladonna Lilies
    • Books
      • Steve's books
        • Tetras
        • Andy Brown Stories
      • Luna's Books
      • Richard F. Challis's books
      • Robert Challis Books
      • Free Comics
      • Free Best sellers
    • Fish
      • Tetras
        • Emperor Tetra
        • Neon Tetra
        • Evolution or Creation of the Blind Cave Fish
      • Live Bearers
        • Mosquito Fish
        • Guppies
        • Swordtail
        • Platies
        • Mollies
        • Endlers Guppy
      • Danios and White Clouds
        • White Cloud Mountain Minnow
        • Zebra Danios
        • Queen Danio
      • Australasian Fish
        • River Murray Rainbowfish
        • Southern Pygmy Perch
        • Lake Eacham Rainbowfish
        • Red Rainbowfish
      • Why Fish Don't Exist.
      • Fish Facts and Myths
        • Viruses
        • Chlorine and chloramine
        • Dyed Fish
        • Oxygen and Fish
        • White Spot Disease
      • Barbs
        • Arulius Barb, Puntius Arulius
        • Black Ruby Barb
        • Cherry Barb
        • Tiger Barb
        • Rosy Barb
        • Odesa Barb
        • Tinfoil Barb
        • Gold Barb
        • Five Banded Barb
        • Spanner Barb
      • Sharks
        • Silver Shark
        • Red Tail Black Shark
        • Great White Shark
        • Black Shark
      • Catfish and Loaches
        • Bristlenose Catfish
        • Algae Eater
        • Kuhli Loaches
        • Black Kuhli Loach
        • Reticulate Loach
        • Phantom Glass Catfish
      • Goldfish
      • Fish Food
        • Feedwell Fish Food
        • Colour Enhancing Fish Food
        • Bloodworms
      • Bettas & their Relatives
        • Blue Gourami
        • Dwarf Gouramis
        • Honey Dwarf Gourami
        • Paradise Fish
        • Pearl Gourami
      • Coexisting with Fish
        • Hydras
      • Turtle Keeping
    • Space
      • Comets
      • Deinococcus radiodurans
      • First Animals in Space
      • Andromeda Galaxy
      • Lichens
      • Single Species Ecosystem?
      • Tiffany Rat

Evolution or Creation of the Blind Cave Fish

Evolution or Creation of the Blind Cave Fish

The Blind Cave Tetra, Astyanax mexicanus, is a subspecies of the Mexican Tetra without functional eyes. The place the eyes should be is covered by skin. This fish comes from cave systems in Mexico. 

People have asked the question, was this fish created for these conditions, or did it evolve?


Evolution?

These cave systems are connected to surface waters, and some Mexican Tetras found their way in. Some of these survived despite the lack of light in the caves. The ones better able to find food without using their eyes were more likely to survive and these were the ones which bred the next generation. Small, or big, differences accumulated. Now the blind cave fish has a better sense of smell than their sighted cousins as well as an improved lateral line sense.

Darwin thought that disuse of an organ by itself would result in the loss of that organ and there is a possible genetic mechanism for this to happen, but there may be advantages from having no eyes to the Blind Cave Tetra. These include having less brainpower required for interpreting their vision, leaving more for interpreting the inputs from their other senses.

This isn't evidence of the formation of a new species, because the Blind Cave fish is still in the same species as the other populations of the Mexican Tetra.

Creation?

The creationists suggest that this fish was created suitable for these conditions. Some creationists use the existence of this fish as evidence against evolution. This is based on the idea that the blind cave fish is a simpler form than the normal Mexican Tetra, and things evolve to more complicated, not to simpler forms.

On this basis, the existence of this sightless fish is evidence against one interpretation of Saint Augustine’s Theory of Evolution, it is no evidence against the theory of evolution by natural selection proposed by Charles Darwin and Alfred Wallace in the nineteenth century.

There is no reason to expect that all advantageous characteristics will be more complicated than the one they replace. There are plenty of examples of simple living organisms which are good at surviving. Bacteria have been one of the most successful organisms.

Another successful organism is Duckweed, a tiny flowering plant of the genus Lemna which also appears to be an example of evolution to a simper form.

 


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