Animal Stories - Comet Goldfish


Animal-World Information about: Comet Goldfish

Comet Goldfish look just like regular goldfish but with a much longer and more deeply forked tail fin!
Latest Animal Stories
Kira - 2013-07-17
I have a 180 gal pond with 2 aerator/filters and live plants. There are 7 2'-3' goldfish in it that I have owned for the past couple of years. I recently bought 4 more goldfish at the store. One ended up having fin rot and is in a hospital bucket receiving medicine. 2 of the new ones are happy and perky. The other new one is extremely lethargic. It swims normally when it decides to swim, but mostly finds the places with the least current and just floats. It does eat. I managed to catch it (which was difficult) and examined its scales and fins for any obvious problems and didn't see any. All the other fish are still happy and frisky, and I haven't seen any of them picking on the lethargic fish. Any ideas about this little guy?

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  • Jasmine Brough Hinesley - 2013-07-24
    Maybe you should isolate that fish as well. Consider medicating the water and just watch for a couple days to make sure it doesn't develop any signs of a contagious condition? And if he seems to be getting better, then put him back in the pond.
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kye turnbull - 2013-05-09
Should I try to breed these fish?

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  • Clarice Brough - 2013-05-09
    They are easy to breed with the right setup, and it can be fun. Here's a quick over of Goldfish Breeding.
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Greta - 2013-04-18
Hi, I'm a teacher and have had three beautiful Comets for 6 months, since my students won them at a Halloween carnival. We did a lot of research and have them set up in a large tank that we regularly clean. We'd like to upgrade the tank in terms of decoration--currently there is none--but don't know what works better, silk or plastic plants? We've read that plastic can poke fragile goldfish eyes, but silk can get frayed and eaten, thus causing intestinal blockage. Help, please? We'd really love to keep our goldfish happy and healthy for years to come. Thanks so much for any advice you can provide. ~Margarita

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  • Jeremy Roche - 2013-04-19
    Any of the choices will work!  The silk will give more movement and action in the tank.  I prefer silk or live plants.  To fray or break there would need to be something causing it besides the goldfish.  Make sure to properly clean anything you put in the tank.
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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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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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