Animal Stories - Comet Goldfish


Animal-World Information about: Comet Goldfish

The Comet Goldfish is much like the common goldfish, but is a more reddish orange color and has a much longer, deeper forked tail fin!
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Leo - 2013-03-22
The next few questions might sound a bit odd but I’ll give it a shot. I activated another tank and chose to do an experiment with feeder fish. I purchased 12 Comet feeder fish and 24 Rosy Red also feeder fish hoping to become pets? My expectations might be a bit unrealistic but they have spectacular markings that are interesting and beautiful. I do realize that they may have stunt growth but is there a change of recovering as a quality fish? Should they be feed differently? And can they live as long as the so-called quality fish?

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  • Clarice Brough - 2013-03-22
    Feeder fish can make fine pets! Treat them with the same type of care as you would for any other goldfish, including the right environment (a large aquarium with good filtration), good food,and  regular maintenance. The Rosy Reds are  tropical type fish rather than coldwater fish, so be sure to have a heater and thermometer to keep the tank warm enough for them. Also, goldfish are a dirtier fish, adding a large bioload to the tank, so frequent water changes will be needed to keep everybody healthy.
  • Leo - 2013-03-22
    Thank you for your honesty. I love this site. It is a great place to learn from others.
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Anonymous - 2013-03-18
I decided today that I wanted a fish! So my dad took me out and bought 2 comet goldfish and they are small so they are in a 5 gallon tank with a filter.  Water is cold and there are plants in the tank! They were fine when i brought them home but about 2-3 hours of being in the tank 1 started lying on the bottom of the tank and stayed there for a while. The other will swim aroud then lie at the bottom. They are still breathing but barely moving... Should i be worried? They will take turns lying down and i have been telling my little brother that they are 'sleeping' am i correct in saying this?

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  • Clarice Brough - 2013-03-18
    It's a wonderful thing that you want to keep fish. I'm glad you're father helped you get one, and the goldfish are some of the easiest fish for beginners and great pets. Not sure what the problem is, it could be that they are adjusting... or there could be a problem with their water. The first thing I'd check is the temperature and make sure it's not too cold for them. Also, if you're using tap water, a water conditioner that removes chlorines and chloramines is necessary. Also make sure the filter is providing plenty of  water movement so the water stays well oxygenated. Good luck!
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Megan Flynn - 2012-06-06
Hello All, I'm really glad that I have found this site! I have two questions: 1) I have just recently (in the last year) lost two of my goldfish (1 comit and 1 Shabuken) and have one lone common in my tank. He is rather large (~3-3.5 inches). I was wondering, would it be advisable to get another, young goldfish with him, or do you think that he will be aggressive with a strange/smaller fish?   2) When I bought my comit and common goldfish, they both were white with large orange spots. After about a year or so, the orange started to fade and become completely white. Although I do like the white fish, I really like the white and orange. I have read that the orange color tends not to be stable and will fade. Is there any why to keep the orange spots, say, with certain food or lighting? Thank you for any advise you can give me! Megan

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  • Sophie penney - 2013-03-18
    I had a goldfish for about 8 years and he was probably around the same size... I thought since he was getting old it would be nice for him to have company... So i went put and bought 2 more goldfish! Within 3-4 days the 2 new fish had died amd started to kill the old one! I dont know if they were sick or what but i advise that you wait till the old one dies:) good luck
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Kelly - 2012-01-21
my fish just died and i got it just a few hours ago ................ i dont understand why

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  • Clarice Brough - 2012-01-22
    I'm sorry to hear that. Without more information on the tank, and the circumstances, can't really say what happened. But usually fish dying that quickly is a problem with handling, or with the water quality. If you have a new tank, I'm wondering if you used a water conditioner to remove clorine... as chlorine will kill fish very quickly. But again, without knowing info...
  • Nitin - 2012-08-16
    Hi, It is sad, I bought 8 small about 1/2 inch at 3pm by 6pm all were dead and then I bought 7 again thinking it has something to do with water as this is first small 4Gallon tank,,,but I guess I was stupid to do that. The 7 also died by 10pm and the only one which is left is Black moor. Luckily it's alive. But then I did some research on it Comets are mostly for ponds and big Aquarium more than 20gallons as its need lot of oxygen so I learned it the hard way, even some of the websites say that they have bacteria and parasites. Hope it helps....if anyone can tell me in such a small 4Gallon tank what fish will survive pls pls do let me know. Thanks...Good luck
  • Shayan - 2012-10-31
    @Nitin, If you have a 4 gallon tank then you shouldn't be buying goldfish. The best fish to keep would be Betta. But please read and do your research.
  • Olive\'s Mom - 2012-11-08
    When setting up a brand new tank, it's not uncommon for the first set of fish or some of them to die off even if the chlorine has evaporated off. This is because the tank is sterile (no organic matter present) at that time. Living creatures including fish and humans cannot live in a sterile environment. In Nature, their environments would be clean, by nature's standards, not sterile. A Pristine natural environment would never be sterile, or devoid of life. Ther organic matter is the fish themselves and the presence of a low concentration of their waste matter generally. That's why you'd only change out a small portion of their water weekly. That and the filter are what maintain the supportive level of organic matter to clean water. All off Life is about balance. The fish that died off created some organic matter that primes your tank for a new batch of fish. Try adding a new fish maybe one or two at a time.
  • Olive\'s Mom - 2012-11-08
    Also keep in mind the tanks they came from would've had other fish present doing their business in the water making organic matter. This affects the pH level of the water. Like a supportive temperature range, there is also a supportive pH they need. Hope this helps.
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Abigail Portis - 2012-09-05
I would like to conduct my science fair project using goldfish; 'Will the pigment of a goldfish change due to lighting changes?' i was just wondering if you have any reccomendations as to exactly what goldfish i could use and if the comet goldfish is good, should i keep them is a bowl or tank, will lack of light harm them? Thanks, Abigail.

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  • Jeremy Roche - 2012-09-05
    What type of project will you be doing?
  • Anonymous - 2012-09-23
    The lack of light will not harm the goldfish if left long enough it will turn gray
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Taiff - 2012-09-10
Hi, my fish want to jump out of the aquarium every time. Can you explain what could cause this. Thanks.

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  • Jeremy Roche - 2012-09-10
    Quick changes of light will make them jump sometimes.  If room is dark and turn on its tank little it can startle them.  Water conditions can cause this as well.  Test your water.
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Fran Stoll - 2012-10-11
One of my Comets in my pond filled with eggs earlier n the Spring. She hasn't been able to expel them. Now she's so large she can't swim well, isn't eating, and stays on the bottom away from other fish (koi, other comets and a couple of shebunkins. What should I do?

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  • Clarice Brough - 2012-10-11

    Having a goldfish get egg bound is very uncommon, but it has been known to happen. Signs that the female is in trouble include being very swollen, having trouble swimming, no appetite, and spends most of its time on the bottom.



    There is one treatment that is said to sometimes help a fish to either expell or reabsorb the eggs. This is giving the fish a bath in water with Epsom salts. Goldfish keepers use 1 tablespoon of Epsom salts per gallon of water, and leave the fish in for 15 minutes once a day, and no more than that. Also consider keeping the fish in a hospital tank during this time and treat with Maracyn, as it helps prevent infection from any retained eggs.


  • Fran Stoll - 2012-10-15
    Thanks for your comments. My comet seemed somehow in more imminent danger of dying than trying the Epsom salts for a few days. Unfortunately I was right as she died yesterday evening. This is the 2nd sarrasas comet I've had to get egg bound and I lost them both. But now I know to do the Epsom salts bath at first notice of a problem.
  • Clarice Brough - 2012-10-15
    Sorry for your loss.
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Anonymous - 2012-10-14
I have an absolutely beautiful 5 year old Comet who shares a 30 gallon tank with one that is about 3. They are buddies. All of a sudden the 5 year old is looking very lethargic and laying on the bottom of the tank or going to the top and hanging lengthwise down while its mouth is on the surface. I've read about all the diseases and except for this terrible lethargy, I can't see anything wrong. The 3 year old keeps right near his buddy and tries to make his friend swim around. Sometimes he does, but then drops back into his listless behavior. Please can you give me some advice how to help him? It's breaking my heart to watch this and I don't want him to die. Thanks.

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  • Clarice Brough - 2012-10-15
    I'm sorry to hear about your comet. Water quality is very often the problem when a fish becomes lethargic. But other things can contribute like a changes in the temperature or a change in water flow (for example if you moved the filter to another area of the tank), possibly some type of bullying problem, or there could be a parasitic problem. You can't always see these nuisances, but you can see behavioral changes in the fish



    I'd do a significant water change to start, check the tank parameters, and keep an eye on the fish to see if you notice anything else. If there's no change, then I'd look at treating. A simple treatment is to add aquarium salt (or any non-iodized salt) to the water at a ratio of  1/2 teaspoon per gallon. Also, there's a product called Pimafix you can use in conjunction with the salt that helps alleviate some of the trauma effects for the fish. A medication can also be used, at the pet store try to find a product match for the symptoms your seeing. Good luck!
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Josh Keaveney - 2012-04-21
I had several coments in a tank together... I got them all at the same time from a store for .13 each... every morning I wake up and theres at least 2-3 dead?? I have checked everything and its all in the perfect range... the temps perfect... they are showing no signs of stress... scales, tales, and eyes all look perfect... they are perfect looking fish??? I just dont know what to do?? I was wondering if they could have a disease from the pet store? I treated the tank with Tetracycline... and havent lost anymore since I have done this... Any ideas what could be wrong?? Thanks, Josh

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  • Jeremy Roche - 2012-04-21
    These comets normally come in horrible conditions and a lot of the time full of disease. They are mass shipper primarily for feeding other fish.
  • Jeremy Roche - 2012-08-25
    These fish are breed in mass quanities and a lot of the time in poor quality and used as feeders for larger fish.
  • Dan - 2012-08-24
    It could be that you added to many fish at once and therefore the ammonia levels shot through the roof. This may have caused your fish to die of ammonia poisoning.
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Mandy - 2011-12-10
Hi, I have had a fan tailed goldfish for about 5 years and he was very healthy, my tank is 18'' x 12'' x 12''. I recently bought a comet to accompany my original fish and they seemed to be doing well together.
Today I noticed that the fan tailed fish appears to have fin rot as his fins are looking very tatty. Also the comet seems to be 'bullying' the fan tail and the fan tail seems scared of him and is hiding in the corner of the tank. Please can someone advise me what to do.

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  • Sal - 2012-04-17
    I had a comet for 3yrs, it was a beautiful pick in color, happy little thing it was, right up until I thought why not add more fish, looking really empty in there with just 1 fish (big tank) so I bought 6 of the same, and my gums did my fish panic and get scared of the new arrivals. The other fish, being young where picking on my fish, and shortly after my fish died, felt like my friend had died, so word of warning, if your gonna introduce fish, do it one at a time, over a period of weeks to months.
  • Megan Flynn - 2012-06-15
    From what I understand, you should never mix fancy goldfish (such as your fantail) and straight tail goldfish (such as your comet or common). The fancy goldfish can not swim as fast to compete with the comet. If you told the fish store that you already had a fancy, they should have never sold you a comet to put in that tank. Maybe some people have the experience where they can mix the two, but I wouldn't take the chance if this were my fish.
  • Suzanne - 2012-06-25
    I have been devastated this week with the loss of my two beautiful 2-year-old Comets. I recently had my 700-gallon pond cleaned and decided to add some additional Comets. I guess that was a bad move, because they were unhappy to have small companions, or enemies, and now all I have are the little ones I introduced to the mix. I had never had a problem adding fish in the past, but I guess the two-year-olds were content to have the pond to themselves.................there were seven large fish in there at the time that the lily pads died off last winter and five of them disappeared...............bird food, I suspect!
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