#Coldwater tropicals
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aquariuminfobureau · 10 months ago
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Sewellia lineolata is one of the ballitorid hillstream fishes, that are endemic to Asia. They are not "plecos" or loricarids, nor suckers or catostomids, as they are often confusingly labelled in aquarium retail. Loricarids and catostomids are found in other parts of the world. Often they are called a loach, which is fair, because they nest deeply within the traditional, pre-cladistic assemblage, called Cobitidae. Historically, they were regarded as distinct from the loaches.
S. lineolata are collected from Southeast Asian upland waters, which must always be well oxygenated, though not neccessarily as fast moving assume sources indicate, because these fish are found in pools beside riffles, as, well as in the actual rapids. In the wild, they live on gravel, bedrock, and sand substrates, with few submerged plants. Sewellia make an excellent focus for a biotope setup.
This species grows to about 6 centimeters, or 2 and a 1/4 inches. The trade names for S. sewellia, are the reticulated, tiger, and gold ring hillstream fish. For all I know, other species may be traded under these names. Care for all the imported species and morphs of Sewellia sp , is believed to be the same.
S. lineolata have small mouths for fishes their size, and feed on algae, biofilm, and very small invertebrates. In the aquarium this species will eat algae wafers, micro pellets of the sort offered to shrimp, and defrosted invertebrate based foods. These are not considered difficult fishes to feed, and they have no ability nor inclination, to prey on ornamental tank cohabitants.
I don't know the water parameters where they are collected from the wilds, but in the aquarium, their proper care is well established. Their water ought to be moderately hard, and its pH should be about neutral, with the temperture a bit lower than is usual for a tropical tank, with somewhere between 20 to 23 degrees centigrade being a good temperture to maintain.
In the wild they are diurnal, and spend time grazing and foraging, in unshaded water, so I imagine some daytime temperture tolerance greater than that - but its important to know, they experience cooler tempertures by night, and should not be confused with tropical fishes. Permanent exposure to tempertures over 24 degrees, has been noted to lead to emaciation.
They also experience seasonality in the wild, not only of temperture but of rainfall, with run off depositing organics into the water during the rainy season, surely affecting the water chemistry they experience. My point is, these are hardy loaches that tolerate a range of tempertures and water chemistries, only if the needs of oxygenation are met.
But the ability of fish like Sewellia sp. to temporarily tolerate high tempertures, on a daily or seasonal basis, should not be willfully misunderstood and abused, by people who want yo treat them as though they were tropical fishes. These are "coldwater tropicals".
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plaguedocboi · 1 year ago
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Cool to see a coldwater rocky shore adapted starfish just grasp your hand like that, the tropical reef species we have here just really harden and once relaxed, glide over your fingers
Yeah the starfish at the aquarium here will just Grab anything including people. In the case of this picture, which I’m guessing is what you’re referring to;
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I had picked him up for some kids to pet and as I was giving them Fun Starfish Facts he just realized oh. I can climb this.
And suddenly I had a starfish bracelet
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draconesmundi · 10 months ago
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Thinking of creative ways to group dragons for fun lore posts, making vague polls to get an idea on what people might like to see!
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skippygoldfish · 1 year ago
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I think I've said this before BUT. Since many fancy goldfish are bred and raised in warm water and seem to actually prefer warmer water than their coldwater carp ancestors, the temperature difference between them and tropical fishes isn't that much of an issue. But seeing goldfish being kept with anything other than more goldies still feels so wrong. I think it's because goldfish have such different care needs? Less decor, more food, more large water changes. They are SO much more domesticated compared to tropical fish, which are usually not far derived from their wild counterparts. Plus they are clumsy, and grow large enough to accidentally eat many tropicals.
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cathyellisonacosta · 10 months ago
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boudreauxh · 1 year ago
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thecheshirerat · 1 year ago
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I have more tropical fish experience than goldfish experience but what I do know is that a) You're going to want to get at least a 29 gallon tank--I know it sounds huge but even a single goldfish needs that much space to stay healthy, they can get very very large and they're super prone to ammonia buildup in the water, and if you think you ever want to get Amber a friend, it's +10 gallons for every goldfish past the first one. b) Goldfish are coldwater fish! You don't need a heater like you do for tropical fish but you DO need a filter (again: ammonia). Don't bother paying for a starter kit bc that will come w a heater you dont need, buy the tank and filter separately. (Also I recommend looking for used tanks on Craigslist or whatever, can b much cheaper than new, just make sure it's actually water-safe and not a terrarium. Filter should b bought new, though.) A 30 gallon tank needs a filter w around a 120 gallon per hour flow rate, filters are usually marked for a tank size. Ppl at the store can tell u how to cycle the tank before putting her in it. c) In the meantime, to avoid ammonia buildup, you kinda have to be the filter yourself, so do a 50% water change at least every other day in the vase. The big tank will need water changes too, but only ~10% every other week and a 30% change every couple months or so if u have a good filter. Good luck to you and to Amber! -fish
A lot of this is sounding about right, which is probably a good sign! Thanks for the advice :)
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joanielorraine · 1 year ago
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aquariuminfobureau · 2 months ago
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Although the domesticated goldfish and koi are cyprinids of Asian origins, most aquarists attention is focussed on Asian cyprinids from more tropical climates. Which overlooks a number of delightful species suited to unheated aquariums, in a living room with a temperature of about 18 to 22 degrees centigrade.
An example of such a fish might be Sarcocheilichthys parvus, which is traded under the cumbersome label 'Chinese neon golden stripe shark'. Other species in the same subclade of its genus are imported, sometimes in the same shipments, and bearing the same identification - all of them tend to be labelled as S. parvus. So there is a degree of confusion in the aquarium trade but it seems quite irrelevant to their husbandry.
In fact a number of carp species are known as 'sharks', and they do not constitute a clade among that clade. All of them merely evoke in their human observer, thoughts of the marine predators of that name. The cyprinid 'sharks' or 'shark-minnows' possess a high dorsal fin, and often quite a sleek overall form. Cyprinids as a whole are not especially predatory, but 'sharks' tend to swim and feed near the bottom, and possess an underslung mouth
Sarcocheilichthys sp. are zoologically gudgeons, but they share an unusual trait with their distant bitterling kin, which are also carp or cyprinids. Specifically, the females of this genus possess a long ovipositor, and species of this genus are known to deposit their eggs inside live unionid bivalves, in the manner of the bitterlings. Surely this habit has convergently evolved in these two, separate carp lineages.
This is an active, bottom swimming stream fish, native to the subtropical region of southern China, where it is distributed to the south of the Yangtze. There they are found in clear, flowing water, and in these habitats they are sympatric with other fishes such as Microphysogobio, Rhodeus and Rhinogobius. They are normally a little below 6 centimeters, or 2 and a 1/2 inches long, yet can sometimes reach 8 centimeters or a little longer than 3 inches.
In the wild these carp live over mixed substrates of sand, pebbles, and boulders, and they display a preference for environments with clear water. In samples from localities where this fish lives in China, the water pH is 7.5 to 8, and its temperature varies by up to 8 degrees centigrade throughout the year, but averages at about 21 degrees annually. This is similar to a comfortably heated British room temperature.
Feeding the genus Sarcocheilichthys is unproblematic in the aquarium. Their wild diet seemingly includes both animal and vegetable components, and they take to a diet that includes the ubiquitous pellet and flake preparations, as well as defrosted foodstuffs. Because they possess a downturned mouth they are adapted to feed on the bottom, originally on algae and benthic animals.
Although their water must be clear and good quality, it does not need to flow fast. Their decor should both break any severe flow, and provide them with hiding places. They should be kept in a group, among which they might jostle for hierarchy, so about 8 fishes should be the minimum number cohabited, and with good thought put into their aquascape. These are peaceful community fish and certainly 'a bit different' for the unheated freshwater aquarium.
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the-world-of-fishkeeping · 2 years ago
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The Optimal Temperature for a Fish Tank - Ensuring a Healthy Aquatic Environment
Maintaining the ideal temperature in a fish tank is vital for the health and well-being of its inhabitants. Fish are ectothermic creatures, meaning they rely on the environment to regulate their body temperature. As responsible fish keepers, it is our duty to provide the optimal temperature conditions that mimic their natural habitats. In this article, we will delve into the importance of maintaining the right water temperature in a fish tank and explore the optimal temperature range for various types of fish.
Understanding the Significance of Water Temperature
Water temperature plays a crucial role in the overall health, growth, and behavior of fish. Different species have varying temperature requirements, and even slight deviations from their preferred range can have adverse effects on their physiology. Here are some key reasons why maintaining the optimal water temperature is essential:
Metabolism and Digestion: Fish are cold-blooded animals, meaning their body temperature is determined by their environment. The metabolic rate and digestion of fish are directly influenced by water temperature. The right temperature promotes efficient digestion, nutrient absorption, and overall metabolic functions.
Oxygen Levels: Water temperature affects the solubility of oxygen, with colder water holding more dissolved oxygen than warmer water. By maintaining an optimal temperature, you ensure that the fish have access to an adequate oxygen supply, crucial for their survival and activity.
Disease Prevention: Consistently maintaining the optimal temperature range can help prevent the onset of diseases in fish. Fluctuations or extremes in temperature can weaken their immune systems, making them more susceptible to infections and stress-related illnesses.
Reproduction and Growth: For many fish species, temperature variations are closely linked to their reproductive behavior and growth rates. A stable and appropriate temperature range encourages spawning, hatching, and the healthy development of fry.
Optimal Temperature Range for Different Fish
It's important to note that different fish species have evolved in various aquatic ecosystems with specific temperature requirements. While this article provides a general overview, it is always advisable to research and consult species-specific guidelines for precise temperature recommendations. Here are some common temperature ranges for popular aquarium fish:
Tropical Freshwater Fish: Most tropical freshwater fish thrive within a temperature range of 75°F to 80°F (24°C to 27°C). This includes popular species like guppies, tetras, angelfish, and mollies. However, some specific species may have slightly different requirements, so researching their natural habitat is crucial.
Coldwater Fish: Coldwater fish, such as goldfish and koi, prefer temperatures between 65°F to 75°F (18°C to 24°C). They can tolerate cooler temperatures but are sensitive to sudden temperature fluctuations. Extreme temperatures can stress coldwater fish and lead to health issues.
Marine Fish: Marine fish species have diverse temperature preferences depending on their origin. Generally, the optimal range for marine aquariums is between 74°F to 82°F (23°C to 28°C). However, it is crucial to research the specific requirements of each species, as some tropical marine fish may require higher temperatures.
Betta Fish: Betta fish, also known as Siamese fighting fish, thrive in warmer water. The ideal temperature for bettas ranges from 76°F to 82°F (24°C to 28°C). Maintaining consistent warmth is essential to their overall health and vibrant colors.
Maintaining the Optimal Temperature
To ensure the optimal temperature for your fish, consider the following guidelines:
Use a Reliable Aquarium Heater: Investing in a high-quality aquarium heater with a built-in thermostat is crucial for temperature control. This allows you to set and maintain a consistent temperature within the desired range.
Regular Monitoring: Use an accurate and reliable thermometer to regularly monitor the water temperature. Check it multiple times a day initially to ensure stability and adjust the heater accordingly.
Avoid Temperature Fluctuations: Sudden temperature changes can shock and stress fish. Keep the fish tank away from drafts, direct sunlight, and heat sources like radiators or air conditioning vents to prevent sudden temperature fluctuations.
Research and Adapt: Before introducing new fish species to your aquarium, research their specific temperature requirements. Make any necessary adjustments to the overall tank temperature to accommodate the needs of the new inhabitants.
Maintaining the optimal temperature in a fish tank is a crucial factor in providing a healthy and thriving aquatic environment. By understanding the specific temperature requirements of your fish species, you can ensure their well-being, growth, and reproductive success. Regular monitoring, investing in tropical fish tank for sale, and adjusting as needed will help create a stable and comfortable habitat for your aquatic companions. Remember, a well-maintained temperature is just one aspect of overall aquarium care, and providing clean water, proper filtration, and appropriate nutrition are equally important for the well-being of your fish.
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vnvyb · 2 years ago
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nezclaw · 1 year ago
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they are also incompatible with each other. goldfish are coldwater. plecos are tropical. a common pleco can easily get to a foot in size, and "growing to fit the size of the tank" is a myth. a goldfish needs iirc 75 gallons at minimum for a fancy and common goldfish are better off in a pond. also goldfish produce so much waste. you need beefy filtration and frequent water changes to keep the water even remotely clean. and by frequent i mean at least weekly.
It's frustrating that so many people buy pet inverts without doing any kind of research about their care beforehand and they end up with a totally inappropriate habitat, diet, and/or general care.
Bugs are animals! If you're going to keep them, please learn about them from multiple sources before buying them. Reddit subs are an especially good source. Avoid pet store care sheets, as they are often deeply wrong.
Also depending on the species, initial setup can cost quite a bit, relatively speaking! If you can't afford an appropriate habitat, then you can't afford to keep the animal as a pet. It's not okay to give them an inappropriate or bare-bones setup because that's all you can afford. Save up and do it right from the get-go.
There's a lot of bad information out there on invert and exotic care, and we're always learning more. It's okay if you did do research, but you were given bad advice. Just be open to new and better information and make the necessary changes.
Thanks for coming to my rant :)
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archcacao · 2 years ago
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robynonposh · 2 years ago
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cathyellisonacosta · 2 years ago
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cenedrariva · 11 months ago
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So generally, modern corals require warm, clear, shallow waters to live. They are found within the first 30m depth of the ocean because they need bright sunlight to live, and their typical temperature ranges are 23°–29°C though they can survive cooler and tolerate hotter. Corals dislike having a lot of sediment in their waters, it blocks the sunlight and interferes with their feeding methods, so you will not typically find corals at the mouth of a river
That being said, there are some species of corals that can tolerate much colder waters including as cold as the arctic, and much deeper waters as deep as 3300m. These corals can tolerate a lot more darkness, and feed in slightly different ways, more filter feeding than algae-symbiotic.
So between those two you can cover your planet in corals.
As far as extending the tropical range, this has happened in geological history during times when there were no polar ice caps, called greenhouse earth. No ice caps means higher sea level, and as Addy says above, this can lead to loads of very extensive shallow seas, which is very good for most corals. In fact a lot of limestones were formed during the Cretaceous in those shallow seas, from things like reefs.
The problem with extending the tropical range isn't going to be your temps, but your light levels. Most corals are bound by their need for very bright sunlight, so placing them at any latitude that has months of long nights or even full darkness could kill them. Your corals at these ranges would need to enter a time of slowed growth or hibernation to survive.
With the extinctions, as long as the conditions causing the extinction are not having a huge impact on the water clarity, temperature, or pH, your corals can likely survive mostly unimpacted. An example extinction that has a massive effect on land and a reduced effect in the oceans is the formation of a pangaea. The massive continent will result in widespread desertification inland, reducing habitat for a lot of terrestrial creatures, but the oceans will be largely unaffected. They will have a reduced range of coastline to attach to though.
Extinction events like massive volcanic eruptions (eg. the Siberian Traps) or meteorite impacts can throw a lot of debris into the atmosphere and reduce sunlight levels, which can result in shortterm cooling and the death of plants. This could harm your corals a lot, depending how long the cool, dark period lasts. Your coldwater corals would be more hardy to it though.
A true coral killer though is acidification of the oceans. It prevents the polyps from being able to properly form their calcium carbonate skeletons, which make up the bulk of the coral. Volcanoes and meteorites both can cause acidification of the oceans. If your extinction event doesn't cause this though there's' a good chance your corals survive.
To have a long period without mass extinctions, you want stability. No matter what conditions your planet has, the longer those conditions stay pretty much the same, the longer it goes before a mass extinction. So, you'd want to avoid things that break stability. No growing or losing ice sheets, no massive volcanic eruptions, no meteorite impacts. Life on your planet will adapt to thrive in current conditions.
Submitted via Google Form:
Because I love coral reefs I am hoping to create a beautiful coral reef planet full of them. A few things that are on my mind. Obviously, coral reefs only grow in tropical areas, which should probably exclude the poles. That's fine. So a few questions on that. What is the best way to extend the tropical range? What is the narrowest possible temperature range between equator and pole? How well can I do if I diversify my corals with plenty of heat or cold resistant coral? What characteristics do those corals need? Also, this is very much a living and evolving planet so I have questions on how these coral reefs have changed over the different periods What would make the current period long-lasting and not have had the last mass extinction too soon? I want certain coral species to be ancient and have survived multiple mass extinctions. How can I design those?
Addy: I did some searching, but I'm no climate-dinosaur expert, so the best I've got for you are some rough outlines of our own planet's history.
We've had many coral reefs over the eons - the largest (from my understanding) were during the late Devonian period, but they were actually made of different creatures than what make up our modern reefs. They died off, though, and our modern corals took their place. Those modern corals really took off during the Cretaceous period, so I'm looking at that for climate stuff.
The Cretaceous period had high water levels (~300+ ft above modern sea level), which meant that you had large, shallow stretches of ocean over areas that would otherwise be land. The poles didn't have ice caps (average polar water temperature was around 40°F), and Antarctica was covered in forests.
You did have periodic oxygen deprivation events, but you could probably prevent those by introducing some more currents into your oceans. Our Cretaceous period had some pretty clustered continents, which, to compare it to HVAC, meant that they didn't get a lot of ventilation. Really easy for it to get stuffy in a room without ventilation… or to use up all of your oxygen and suffocate. So! Make the areas a bit less clustered, give your continents a bit more room to breathe. Open a metaphorical window. That'll help prevent mass extinctions.
For land temperatures… from what I could find online, the areas within the latitudes from the equator to ~10° were tropics, the 10°-30° latitudes were arid subtropics*, the 30°-45° latitudes were humid subtropical with moderate/heavy rainfall, and then the polar regions were temperate.
* Might be from the oceans getting squeezed like that, not much room for the winds to pick up ocean spray
A couple useful links:
https://www.climate-policy-watcher.org/global-climate-2/cretaceous-era.html shows some specific temperatures for certain regions
https://www.bgs.ac.uk/discovering-geology/fossils-and-geological-time/corals/ info about corals
https://www.britannica.com/science/Cretaceous-Period info about the Cretaceous period
So if you've got a warm planet with large regions of shallow ocean, then you've got a coral-happy environment. We have sections of modern Earth that are like this, but they're only sections. Cold-resistant coral are going to live a bit deeper in the ocean, and are a sort of bastion of safety when ocean temperatures rise. They don't support the same marine species as the shallower reefs, but the cooler temperatures they live in are generally safer during periods of global warming (which we're seeing again now, as the planet warms).
Certain coral species to survive… I'd say that you'd get family lines that'd survive, that's easy, no problem. Whatever didn't die in the last mass extinction lives on, and its offspring will be whatever species come next. If you want it to be an exact species, then you'd probably need to have the last extinction to have happened relatively soon. If you're just looking for something that looks similar and acts pretty much the same, then it can have happened however long ago, no issue. 
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