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Frog metamorphosis

  1. Jun 12, 2009 #1
    I used to have a bunch of tadpoles and they never turned into frogs. Long after I got rid of them, I read up about how tadpoles need a certain kind of mineral or something in the water (forgot what it was) or else they won't turn into frogs.
    Recently I tried to read up on it some more and I couldn't find ANYTHING on the internet that talks about that.

    So do tadpoles really need this element in their water, whatever it was, or am I crazy?
  2. jcsd
  3. Jun 12, 2009 #2


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    They would obviously need proper nutrition to grow sufficiently to undergo metamorphosis, but I don't think that would include anything special in the water.

    How long did you wait for your tadpoles to undergo metamorphosis? The timing is species dependent. Some will only take a month or two from hatching to metamorphosis, and others can take a full year. Water temperature can also affect the rate of metamorphosis, with cooler temperatures slowing the process.

    I have no way to know if you're crazy though. :wink: With all the odd things around on the internet, who knows, maybe you did read something...doesn't mean it was right.
  4. Jun 12, 2009 #3
    Yeah I fed them and the water was probably a little cold, but I live in Florida so it couldn't have been too bad.
    I had them in there a while. My uncle gave them to me. I wanted them because they were so big. They were the biggest tadpoles I'd ever seen.
    I put them in a big container and left them outside with a covering over it partly and fed them stuff.
    Since they were big when I got them, I assumed they were close to metamorphosis. Maybe I was wrong. I had them for maybe a little less than a year.

    And assuming everything you read on the internet is correct, then I'd have to be crazy if it turned out not to be true.
  5. Jun 12, 2009 #4


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    Yep, sounds like you had bullfrog tadpoles. They can take over a year to undergo metamorphosis and would be BIG.
    http://web.uvic.ca/bullfrogs/page4nathist.htm [Broken]
    Last edited by a moderator: May 4, 2017
  6. Dec 28, 2009 #5
    Here's a video where the guy explains that tadpoles need iodine to develop into frogs. I heard this somewhere else, but I couldn't find any other sources.
    He says it starting at about 3:00 into the video.
    So apparently it's iodine.
    Last edited by a moderator: Sep 25, 2014
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