mgk;3789481; said:i was responding to your statement which claimed they would die in the higher temp tank, which they wont.
the short body types, are more delicate they have different needs. its like comparing people with osteoporosis to football players.
Yes they will. You don't read very well. Shortened life span. Water at that temp with cut a goldfish's lifespan down to only a few short years. They should live 25-30. Even if your managed to get one to live 12 years like that you will still have cut its life in half. No they won't die tomorrow in water that temperature, but the long term health of the fish is significantly compromised and so is its quality of life.
Compare it to smoking. If you picked up a pack a day habit today, would you die tomorrow? No. Would your life span be significantly shortened, your health and quality of life greatly reduced. Yes. Water temps over 70 are REALLY BAD for all types of goldfish. A short term elevation due to summer time temps is like having a cigarette, even short terms at high temps are chipping away at the life span. Goldfish need cold water. This is not gray area, its not an opinion, its a fact. You are incorrect.
Here is a link to about 15,000 articles published by scientists in peer reviewed journals discussing the impacts of high temperatures on goldfish physiology. Perhaps some light reading will help you to understand. http://scholar.google.com/scholar?q...-US:official&hs=1Zl&um=1&ie=UTF-8&oi=scholart
The different needs of dual tailed fish have far more to do with water currents, swimming space and to some extent diet, there are NO credible differences in temperature needs.