Coldwater fish, in the context of aquariums, refers to fish species that prefer cooler water temperatures than tropical fish, typically below 20 °C (68 °F).
They are excellent for starters who have the cold aquarium. The gold fish prefer temperatures that are between 62F to 74F. Since the gold fish are messy eaters, you will be sure to routinely change at least 10% of the water on weekly basis. Using de chlorinator to treat the water is a major stepping stone too for ensuring that your fish remain healthy.
The type of marine life in both places is pretty analogous (crabs, lobsters, fish, eels, squid, etc.), however there are still differences. In warm water, the fish are usually pretty colorful, with a few exceptions. Usually the fish, nudibranchs, and crustaceans are brightly colored and out in the open for all to see (once again there are exceptions). In cold water, the beauty is in the camouflage. Most creatures around here are dark colored and are masters of camouflage (as usual there are exceptions). Some examples include the flamboyant peacock mantis shrimp seen in Indonesia versus our fairly drab spiny lobsters, the damselfish in warm waters are very bright as well as our own Garibaldi, and warm water has brightly colored sweetlips (the fish) and we have pretty drab looking rockfish.
Most Beautiful Cold Water Fish..
7 Easy coldwater aquarium fish | Aquariadise
Kevin Abercrombie, Rochester, NY, August 10, 2010 Good morrow! Long time fan, first time emailer, I've been visiting your webpage for quite some time. I've learned a great deal about fish for my aquarium from your website, I owe a great deal of my healthiest and happiest fish to you guys however, I have seen nothing about the most daunting task for a large population of the United states, how to keep to keep a tank cool? I only have a small 10 gallon tank with a sweaty pumpkinseed sunfish that requires colder water, and with the summer months here in Rochester, New York (yes, it does get mighty hot up here, 85 degrees is the average this month) the lid leaving, fan evapo, ice cube dunk tank method is not quite cutting it in my tank. Can you please add an expert's guide to cooling an aquarium on your website it would be more than greatly appreciated. Sincerely, Your #1 Fish FanFish are affected by temperatures in a similarway as reptiles, but it's important to think aboutcertain properties of their environments that makeit a bit simpler for fish. First, fish metabolismand functioning is very much affected bytemperature. If you have ever had pet fish, youwere definitely not allowed to keep tropical fishwith goldfish due to different temperaturerequirements. Fish generally stay in one habitatof the ocean, where they are adapted to thetemperature, rather than swimming the entire oceanfreely. Fish adapted to colder environments, likesalmon, wouldn't be found in the tropics. Now, whydo fish not show the same sluggish behavior thatreptiles do in the cold or in the winter? This isbecause water maintains its temperature muchbetter than air (if you've had Chemistry, the heatper volume required to raise the temperature ofair is much less than the heat per volume requiredto raise the temperature of water). If you're evertrying to boil water, it's pretty clear that airheats up much faster than water. So, the water isnaturally resistant to temperature changes in theair, and there isn't much daily variation in watertemperature. Thus, fish maintain their internaltemperatures by staying in water of the correcttemperature, which is much less sensitive to dayand night than the air.