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    Thread: Full Grown Comet Goldfish Minimum Length

    1. #1
      TJeep's Avatar
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      Full Grown Comet Goldfish Minimum Length

      I keep seeing that Comets can reach up to 12", but I can't find anything stating what their minimum length should be...

      I do understand water quality, pond size, stocking rates all factor into the equation and I'm not looking to get into that debate rather is there a min size they reach after 3-4 years. Mainly just curious so not urgent, but figured if this group didn't know I was out of luck.

      Thank you!

    2. #2
      EmeraldDragon's Avatar
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      This is what I found, it depends on the environment and the living space. If you want it to not grow a lot then don't give it a lot of spaces. That is to my understanding. Seems to be the same concept as the Koi. More space more growth, less space less growth. In comet case, the maximum is 12 inches, and the minimum controlled by spaces.

      The maximum Comet Goldfish size when fully grown is 12 inches long (assuming they have proper space to grow).

      When you buy a Comet Goldfish, itís usually a small juvenile thatís only a couple inches long. But that will change in a hurry!

      As with any fish, their environment plays a big role in how big they can get. Poor water conditions can stunt their growth and shorten their lifespan. However, Comet Goldfish are a bit different.

      Itís believed that the fish have a Growth Inhibiting Hormone that will affect their adult size. The hormone adjusts to the size of their environment. So, a larger habitat will result in bigger fish and vice versa.
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    3. #3
      *Ci*'s Avatar
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      I have culled fry that got thrown into my lily ponds for mosquito control. In unfiltered water, and unfed other than larvae and algae, the oldest are maybe 5-6 years old and no bigger than 2” to 3”. The comets (and parents of the fry) in my koi pond are pushing the 12” mark.
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      Quote Originally Posted by *Ci* View Post
      I have culled fry that got thrown into my lily ponds for mosquito control. In unfiltered water, and unfed other than larvae and algae, the oldest are maybe 5-6 years old and no bigger than 2” to 3”. The comets (and parents of the fry) in my koi pond are pushing the 12” mark.
      Good info... TY for sharing!

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