Goldfish with red marks

Question

i have 3 goldfish and i have recently noticed some red marks on 1 of them. down it like nose then across its fin . Does anyone know what they are? and how can treat them

thanks

Answer 1

This has nothing to do with sexing or breeding-- it's a bacterial blood infection known as septicemia.  This is very common in stressed fish, either from poor water quality, cramped conditions, or poor diet.  The first two aspects are very likely with Goldfish, as they get very large and produce massive amounts of waste.  For 3 fancy Goldfish (6-8" each), you should be looking into a 40+ gallon tank, and for 3 Commons (more than a foot each), around 100+ gallons.  Weekly water changes are a must, and in smaller tanks, they will need to be performed far more frequently, regardless of the quality of your filter.

The best treatment would be a bigger tank, more frequent water changes, adequate filtration, and for temporary relief, a medication like Maracyn 2, Furan 2, Kanaplex, Metronidazole, Flagyl, Hexamit, Triple Sulfa, Trisulfa, or others.  Be sure to remove any activated carbon from the filter during treatment, and if using tetracycline, minocycline, oxytetracycline, or any other drugs in the tetracycline family, keep the tank dark, as they degrade with exposure to light.

Septicemia: http://www.aquariumhobbyist.com/guppies/...

http://www.wetwebmedia.com/CypriniiformP...

http://www.nps.gov/piro/parknews/images/...

Answer 2

JUST HIT IT HARD....  THERE WILL BE MORE RED MARKS....

HA HA HA  ....   COME ON...   LAUGH....

ITS A JOKE....

Answer 3

i THINK this is the only way to tell male from female but only during their time of breeding.

also there is a disease that causes this...you would need to go to a petstore and get some water tablets.  

Answer 4

Nonsense..thts not the way to tell a male from female...do they look like blood streaks???how big is your tank??what filter???did you cycle your tank??how long has it been set up with the fish??and test your water..whats the ammonia, pH, nitrites and nitrates??

Answer at least the questions that don't need tests...and I ll EDIT..