Minnows and Danios are some fish that can live in the same tank as Goldfish. However, it is best that no other fish are in the tank with them. More »

Goldfish are part of the stenohaline species of fish and tolerate only fresh water, according to Live Science. Both wild and pet goldfish thrive in cooler water temperatures. Ideally, water temperatures should stay betwe... More »

www.reference.com Pets & Animals Marine Life

Guppies, like other tropical fish, do not survive well in a tank with goldfish.They have different habitats that they need to survive. More »

Goldfish eggs hatch within 48 to 72 hours, and the fish may live as long as 15 to 25 years. Within a week, the young start to resemble goldfish more closely, although they don't develop mature goldfish coloration until t... More »

Goldfish can lose their scales if the quality of the tank water is not optimal for their health, if they receive a burn, if they scrape against something while swimming or if they are fighting with other fish in their ta... More »

Goldfish usually do best when fed two or three times per day. At each feeding, it is best to put a small amount of food in the tank. If the goldfish eats all the food within one or two minutes, a second helping of simila... More »

Goldfish tend to attack each other when a food source is scarce. Increased competition for dwindling food sources leads to a fight for the food. More »