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Care must also be taken when adding water, as the new water may be of a different temperature. Temperatures under about 10 °C (50 °F) are dangerous to fancy varieties, though commons and comets can survive slightly lower temperatures. Extremely high temperatures (over 30 °C (86 °F)) can also harm goldfish.
Goldfish can live for long periods of time if they are fed a varied diet and housed in proper water conditions. The average lifespan of a goldfish is ten to fifteen years. [citation needed] The longest-lived goldfish on record lived to age 43. [8] The oldest living goldfish was Tish, won by a UK family at a funfair. [9]
Warmer temperatures would actually increase their metabolism and shorten their lifespan. [1] For a tropical fish tank, maintaining a warm environmental temperature ranging between 75 and 86 °F (24 to 30 °C) enables different tropical fish to thrive at different temperatures. [2] Aquarium substrate usually consists of sand or gravel.
It supports double anal and tail fins. The anal and caudal fins are well divided into two matching halves. Although generally considered a hardy goldfish, Fantails can be sensitive to prolonged exposure to low water temperatures. Keeping Fantails in an aquarium requires an ideal temperature of 73 to 74 °F (23 °C) [2]
The water temperature affects the amount of oxygen available as cold water contains more oxygen than warm water. [4] Coldwater fish species survive in the coldest temperatures, preferring a water temperature of 50 to 60 °F (10–16 °C). [5] In North America, air temperatures that result in sufficiently cold water temperatures are found in the ...
Living for up to two years, these spiral-shaped snails, which sometimes have black spots, will feel right at home in hard water, with a pH level between 6.5 and 8.5 and a temperature between 65 ...
Cool-water species, such as smallmouth bass and walleye, can tolerate a wide range of temperatures, but tend to be most abundant in cooler rivers or deeper parts of ponds and lakes, where the temperature is slightly lower than room temperatures. Cold-water species, such as salmonids (e.g. salmon, trout, char, graylings, freshwater whitefishes ...
The degree of endothermy varies from the billfish, which warm only their eyes and brain, to bluefin tuna and porbeagle sharks who maintain body temperatures elevated in excess of 20 °C (36 °F) above ambient water temperatures. [43]