Welcome to Goldfish Image Gallery

Common Name - Ranchu Scientific Name - Carassius auratus Identifier - Toirtis	Common Name - Red Oranda Scientific Name - Carassius auratus Identifier - Janell McMorran	Common Name - Red Oranda Scientific Name - Carassius auratus Identifier - Janell McMorran
Common Name - Ranchu Scientific Name - Carassius auratus Identifier - Experts from www.goldfishparadise.com	Common Name - Ryukins Scientific Name - Carassius auratus Identifier - Experts from www.goldfishparadise.com	Common Name - Ryukins Scientific Name - Carassius auratus Identifier - Experts from www.goldfishparadise.com
Source - AquaPets Common Name - Jikins Scientific Name - Carassius auratus Identifier - Toirtis	Common Name - orange fantail Scientific Name - Carassius auratus Identifier - Toirtis	Common Name - Ryukins Scientific Name - Carassius auratus Identifier - Experts from www.goldfishparadise.com

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The goldfish is usually classified as a coldwater fish, they prefer cool water in the range of 35 to 75 degrees F. with 65 degrees being about ideal and it can live in an unheated aquarium. Like most carp, goldfish produce a large amount of waste both in their feces and through their gills, releasing harmful chemicals into the water. This also happens because goldfish cannot digest an excess of proteins, unlike most tropical fish.Build-up of this waste to toxic levels can occur in a relatively short period of time, which is often the cause of a fish's sudden death. It may be the amount of water surface area, not the water volume, that decides how many goldfish may live in a container, because this determines how much oxygen diffuses and dissolves from the air into the water; one square foot of water surface area for every inch of goldfish length (370 cm²/cm). If the water is being further aerated by way of water pump, filter or fountain, more goldfish may be kept in the container.