ORIGINS Southeastern Canada and the eastern US, near the Great Lakes; also in Louisiana and Mississippi. Source. Fancy Goldfish (Carassius Auratus) Maximum Size: 8 inches. Because many homes are not kept in that temperature range day and night, these fish require a heated aquarium. However, there hasn’t been a chance in classification yet. Mollies. While they’re not overly difficult, there are a few areas of care that you’ll need to be familiar with. There are usually some species-specific details you need to be aware of, but nothing extreme. The Empire Gudgeon has some of the most interesting fins out there. https://www.thesprucepets.com/what-fish-species-are-coldwater-1380965 Marine fishes must constantly export ions to maintain osmotic balance. Their bodies are very textured and they almost look like they’ve been rendered by a bunch of polygons. For such a unique animal, the Axolotl is actually quite straightforward to keep. Unless you’re looking for a very cold tank, there’s no reason not to give them a shot. We’ve been massive fans of the dojo loach for quite some time. by theaquaaddict. That’s where this guide will come in handy. This is a fairly low-maintenance fish as well. They’re compatible with the majority of fish on this list. Best Cold water & Temperate Freshwater Aquarium Fish In this video see my list of the best coldwater and temperate fish for an aquarium. They’re quite affordable, easy to care for, and are compatible with many different kinds of fish. But if we had to choose, this would probably be our favorite! For example, koi and goldfish are commonly considered to be cold-water fish because of their ability to survive at very low temperatures, but their temperature preferences are 32°C (89.6°F)[1] and 28°C (82.4°F),[2] respectively. Bloodfin Tetras are a species we absolutely love. In fact, most of the aquarists who know about them are ones who like keeping cold tanks. When it gets too cold, they even hibernate. This gives you a lot of flexibility when it comes to the kind of habitat you want to keep them in. This is a very neat species that is often kept in ponds. This really makes their beauty worth it! Plecos are originally tropical fish, so most don’t do well if waters fall below 65 degrees F. What is your average pond water temperature, and do you live in an area that has winter? On their head and nose area, they have a series of appendages that protrude in various directions. This part is obvious but there are variables in water temperature that is related more to weather than the actual warming hours of the sun. We recommend this species to other aquarists all the time. The funny thing is not many people know about this fish (even the ones that want to keep fish without a heater). There aren’t very many fish with a bright yellow that can compete with the Sunset Variatus Platy. If you’re looking for a cold water fish that adds a lot of color, we recommend giving these creatures a shot. What is the ideal temperature for Oscar Fish? Thus, if the air temperature is 70 °F (21 °C) then the water temperature will be lower. pH: 7.0 … They’re not very hard to care for and are rather active fish. Goldfish, for instance, are considered COOL water fish and prefer temperatures in the 60 degree range. Fancy goldfish will get along with many other species and don’t require a lot of effort to keep healthy. They’re a species that not many people pay attention to, but that’s something we’ve never understood. Paradise Fish have mesmerized aquarists for years with their bright colors and flowing tails (us included). But for some reason, this species doesn’t get the attention it deserves from the fishkeeping community. These are one of the most beginner-friendly fish out there. Caring for these fish is something that anyone can do. They’re not only quite colorful and pleasing to look at, but they’re easy to care for as well. In fact, there’s still some debate about their ideal water parameters! This is why they’re also called the Bushy Nose Pleco. However, this does not mean that they should be kept in cold water. These fish most likely died from lack of oxygen before becoming lodged in ice. They don’t need anything in particular when it comes to their habitat as well, so you can plan around their tank mates. You should also take special precautions to protect the fish in extreme conditions when the water is … In cold temperature, a Betta fish’s body will become cold, and to preserve the warmth of the body, homeostasis will automatically decrease the body’s metabolic activity. They’re peaceful which gives you a lot of options when it comes to tank mates as well. This species is quite vibrant and will add a whole new visual dynamic to any aquarium they’re kept in. It will save you a few bucks and allow you to experiment with keeping a more natural tank. One of the reasons these fish are so popular is their versatility. Tropical fish should not be kept with cold water fish. These fish are very hardy and can thrive in a variety of different conditions. They’re very pretty fish that have a neat color pattern. Odessa barbs are often overlooked by freshwater aquarists. It can be hard to spot them at times! They’re a very mellow and easygoing fish that is compatible with plenty of other species as well. They’re addicting to watch swim around in the tank. This makes them a great nano fish for small tanks as well. Coldwater fish, in the context of aquariums, refers to fish species that do not require a heater to remain within tolerable temperatures in a typical indoor aquarium. In our opinion, this is one of the most enjoyable fish to watch. Caring for them is rather straightforward as well. This is easy to work around though. Eliminate high protein diets when the water temperature gets to 60-65°F and start feeding them "Spring and Autumn Fish Food" or those designed for cold water feedings. In case you want them to be kept in … Size: 2 inches Difficulty: Beginner Minimum Tank Size: 10-15 gallons Water Temperature: 64°F to 72°F These creatures spend their time in waters with very fast currents. Unlike tropical aquariums, you don't need to provide a heater for your cold water fish tank, however, it's a good idea to use a thermometer, so you can ensure it's kept at a nice comfortable, constant temperature for your fish. Therefore, it needs a betta fish heater to properly maintain the betta fish temperature in your tank for keeping bettas warm in winter, and staying in good health as well. Bettas are an example of a very popular fish that requires tropical temperatures towards the upper end of the scale. Theses fish are quite hardy and can handle a wide range of water and habitat requirements. These fish are interesting because they will spend a lot of time in schools when they’re younger. They’ll be just fine! Out of all the fish we recommend to our readers, this could be the species we suggest the most. Even in the reef environment, the daily temperature swings from 68-90°F (20-32°C). This species goes by two names, the Medaka Ricefish and the Japanese Ricefish. The notion of keeping a fish that doesn’t need a heater might feel weird at first. Cold water Walleye fishing without any ice can be challenging if you do not understand how the fish behave, feed, and react under these conditions. This species is not found in very many tanks. This small fish is very easy to care for and is a great option for anyone looking for a species that won’t take up a lot of their time. They’re found in tanks…, The 15 Best Types Of Freshwater Aquarium Catfish, Clown Loach Care: Tank Size, Food, Lifespan, Tank Mates…, 35 Peaceful Community Fish For Your Tank (Updated List), Malaysian Trumpet Snail 101: Detailed Info & Care Tips, Bucktooth Tetra 101: Care, Feeding, Aggression, & More, Glowlight Tetra 101: Care, Tank Mates, Breeding & More. This fish can brighten up even the dimmest tank with its vibrant yellow. This makes them great for aquarists looking for a cold water option that doesn’t sit around at the bottom of the tank all day! As long as you take the time to understand their main care requirements and how to set up their habitat, you should be just fine. But hey, the more, the merrier, right? Note: The above contains a mix of true coldwater fish and sub-tropical fish that can survive and thrive at room temperature which ranges from 15 °C (59 °F) and to 30 °C (86 °F).[3]. This is one of the most colorful freshwater species out there. Out of all the fish on this list, the Pygmy Sunfish is up there in terms of its ability to handle low water temperatures. The term is also used to refer to fish species in the wild (such as lake trout, Arctic char, and Arctic grayling), that prefer colder waters. Spending some extra time to be confident you’re ready and willing to keep them in your aquarium is the responsible thing to do. The reason Hillstream Loaches have a low and flat body comes from their natural habitat. A group of these moving around an aquarium is something you need to see in person. They’re low-maintenance, beautiful, and get along with a large number of other fish. With an ability to thrive in water temperatures as low as 50°F, the Dojo Loach should be at the top of your list for fish that don’t need heaters. They share a lot of the same traits as other goldfish, they just look different. The Roxy Barb is a species that has a dedicated following of aquarists for a number of additional reasons (aside from their coloration). You can also breed them if that’s something you’re interested in as an owner. Breeding can be stimulated in mature fish by a rise in temperature to 80° – 82°F combined with a partial water change. For ordinary maintenance of angelfish, a temperature of around 75°F could be considered ideal. This build allows the fish to park themselves on a surface without working hard just to avoid getting swept away. It’s worth noting that you’ll need a slight larger tank in order to keep them (a good portion of the fish we’ve covered so far are fine with small aquariums). This is one of the most popular fish in the aquarium scene. For example, lake trout, a cold-water species, can tolerate (survive) temperatures up to 70 to 73 °F but has a core preferred temperature range of 46-59 °F. Fancy goldfish are a popular type of goldfish that tend to have more of an elaborate aesthetic than some of the standard variations. For whatever reason, these fish don’t get the attention they deserve. Some examples are koi, goldfish, weather loaches, hillstream loaches, many species of barbs, sunfish of the family Centrarchidae, many Central American cichlids, and a variety of other species. The Zebra Danio has a loyal following in the freshwater aquarium community. I can't think of any common aquarium COLD water fish off hand. There are many different types of aquarium catfish out there. Tropical fish are those that require heated water, generally in the range of 75-80°F (24-27°C). Because of this, it’s important for this species to have an adequate current. This is not only very generous, but rather chilly as well. While these fish aren’t very popular, there’s a committed group of aquarists who’ve figured out what a great species Rainbow Shiners are to own. No matter what your preference is, we thought it would be foolish not to include them on our list. As long as that’s not a problem, give them a shot! Due to high demand, Gold Barbs can be a little tricky to get your hands on! This type of fish food is better for the dietary requirements for the fish and won't pollute the water with excess ammonia. The Clown Killifish is a gorgeous species that has gotten a lot of attention in recent years. These fish are best for well-planted aquariums. In fact, freshwater fish can experience daily temperature swings of 30°F or more. Fish also dislike extreme changes in temperature, they much prefer consistent temperatures and gradual changes, so a vicious cold snap or a … We’re committed to making our guides as helpful as possible, and welcome the help. To be honest, most of the aquarists we talk to don’t even know this species exists. This makes them a great fish to observe. They’re very peaceful as well which allows you to match them with a variety of other species. Goldfish are cold water fish that live in cool lakes, streams, and river. These fish are great for cold water aquariums since their natural temperature requirements are quite low (this can be as low as 50°F). Learn more. The Bristlenose Pleco has a very interesting look that can’t be ignored. Millie is a passionate aquarist who caught the fishkeeping bug in high school and has been addicted ever since. You will have to navigate some aggression from time to time, but if you set then up with a great habitat from the start that won’t be a problem you have to deal with. They can do well in cooler waters and will happily coexist with a variety of different tank mates. Some argue that this fish should technically be considered part of the killifish family or not. As long as you know their fundamental requirements you shouldn’t have any trouble keeping this fish. T… This fish is also easy to feed, care for, and even breed. Fishing gets tough in very low water temperatures, but some species such as roach, pike and chub will still feed. They are able to tolerant significant drops in temperature – usually down to freezing. Not only does this help replicate their natural habitat, but it also brings extra oxygen into the water (something this fish needs a lot of). This is one of the most aesthetically-pleasing species on the list. Taking this a step deeper, the water temperature and seasons is directly related to the sun and warming hours that the sun provides. True to their name, the Rainbow Shiner is a mix of color and metallic glimmer. You can put them in almost any tank, with almost any other species. They really don’t care! Rosy Red Minnows are one of our favorite species, and near the top of the list when it comes to cold water fish for your aquarium. There are very few fish like it! Not only is this what they’re used to in the wild, but the green vegetation really makes their colors pop! They’re hardy, peaceful, and very easy to care for. This species is a great choice if you’re looking for a fish that will get along with anyone. When the water temperature falls below 50-55°F, it is classified as been too cold for the goldfish. They can even be used as feeder fish if you so choose. This is quite a popular fish because of its unique look and ease of care. Other fish that can tolerate cool water: white cloud minnows, some danios, some barbs, a couple types of loaches. The ideal temperature for Oscar Fish is 77° Fahrenheit. Coldwater fish are fish species that prefer to live in cooler water temperatures than most tropical fish. We have a special place in our hearts for livebearers (or fish that bear live … In fact, they’re one of the most popular…, Clown Loaches are one of the most popular freshwater fish in the aquarium scene. These fish get their name from their aggressive consumption of insect larvae. These little critters are one of our favorite freshwater catfish species to keep in cold tanks. If there are any types of cold water fish you think we should include in this list just let us know! However, some aquarists like to keep them in tanks as well. They’re very beginner-friendly! It is important to note that just because these fish are capable of surviving in unheated aquaria, their temperature preferences may vary. Because many of the ornamental fish considered to be “coldwater fish” are more accurately eurythermal fish and many prefer temperatures similar to, or even warmer than those preferred by certain tropical fish, the term “coldwater fish” in the aquarium context is essentially meaningless, and often misleads pet owners into keeping fish below their preferred temperature. This is a species that’s mesmerizing to look at. Part of what makes the Asian Stone Catfish so adorable is their tiny size. Most of the aquarists we know keep a ton of these fish in their tank. Sunset Variatus Platy. These fish have an extremely interesting look that makes them stand out (or blend in) compared to many other species. Temperature range: 65 – 72°F. They can thrive in cold water, a range of pH levels, and a variety of decorations and layouts. They can survive in water temperatures as low as 50°F which means you can keep them in tanks without a heater (if it works with the rest of your setup). These fish are very active and are almost always in motion. “ Cold- and warm-water fish species have different temperature preferences and tolerances. However, retaining more ions can help to reduce a fish’s freezing point and survive in below-zero temperatures. With a minimum of 45°F, it’s hard to find another species that matches. The One-Sided Livebearer is a simple, yet elegant fish that can thrive in low temperatures. Their interesting pattern and colors make them a great choice for anyone looking to bring some color to their tank. The Rainbow Goodeid is hardy, low-maintenance, easy to feed, and tolerant of a wide range of temperatures and parameters. The most commonly kept coldwater pet fish that you see in home aquariums are goldfish. Environment. As you can see, there are a number of fish that can thrive in cold water aquariums. As long as you give them some variety in their diet and provide a solid habitat, Odessa Barbs will be quite happy. In the spring, when the water begins to warm up, it is due to the earth being closer to the sun, but also to the sun being out longer each day to provide more warming hours. These fish prefer a temperature of 60 to 75 degrees Fahrenheit so make sure to keep it that way. With that being said, they can show a little bit of aggression when put in the wrong situation (or with the wrong tank mates). They’re quite active and friendly, so they’re always up to something. This will result in lethargy, fatigue, loss of appetite, and, eventually, a coma. As Betta fish water temperature changes, the fish’s body temperature will also change. A steady 70-72 °F (21-22 °C) in-door air temperature during the cold winter months should be enough to warm up the water of your fish tank. Apart from the water temperatures, there are a number of other things that you need to take into consideration to ensure the survival of platy fish in an aquarium. When it comes to water temperature, they have an acceptable range of 64°F to 82°F. These fish are fairly low maintenance, active, and peaceful. Due to the fact that the population of this species is in crisis, it’s important to be absolutely sure before you get one. It’s a bunch of fun to watch these fish swim around in a group. The Celestial Pearl Danio is a gorgeous species that many aquarists love. 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