Can I add koi with predator fish?

[vincentwugwg]

The most common cold-water fish species is the goldfish, followed closely by its larger counterpart, the koi.

Cold Water Fish Species for Your Freshwater Aquarium

Optimal water temperature is vital for a community fish tank. Here are some cold-loving fish that will flourish in your cold freshwater aquarium.

www.thesprucepets.com

Even though koi can survive in extremely cold or very hot water, it does not mean that they do well at these temperatures. This is especially true if the extreme temperatures persist for long periods of time. Koi tend to do well when their water is around 65 degrees or slightly higher.

At What Temperature Should You Keep Your Koi Fish Tank?

As a koi owner, it is crucial that you keep your koi's tank or pond at a reasonable temperature. Koi rely on the water temperature to assist with their digestive process and cannot digest food if the water gets too cold. Failure to keep your koi's water within the acceptable temperature range...

animals.mom.me

Coldwater fish in terms of the aquarium trade refers to any fish species that prefer cooler water temperatures. The optimal temperatures for these fish hover around the 68-degree mark, although each species’ temperature range may vary from the norm. The main take away message is that cold water fish like cooler waters compared to their tropical fish counterparts. Typically, these fish can survive at even lower temperatures for a period of time. The most notable fish species that you will see in chain stores that fit this category would be Koi, Goldfish, Zebra danios etc.

What's The Difference Between Coldwater Fish and Tropical Fish?

Newbies just entering the hobby might get confused about whether to set-up a cold water fish tank or a tropical fish tank for their first tank. While both tanks are relatively easy to set up and maintain with proper knowledge and care, there are some fundamental differences that need to be...

aquaticdelights.com

I could go on and on and on with sources. You are simply wrong and giving very bad advice.

Seems like you don't really know Koi were developed via the Amur carp and you assumed koi came from the same lines as goldfish. Perhaps I'm not 'simply wrong and giving very bad advice.' Most of the fish mentioned by the OP are not overly aggressive and this combo can possibly work but he would need a very large tank with good flow but that was not his question.

 

[tlindsey]

Seems like you don't really know Koi were developed via the Amur carp and you assumed koi came from the same lines as goldfish. Perhaps I'm not 'simply wrong and giving very bad advice.' Most of the fish mentioned by the OP are not overly aggressive and this combo can possibly work but he would need a very large tank with good flow but that was not his question.

Tbh I did not know that Koi originated from Vietnam. Learn something new everyday lol.

 

[Magnus_Bane]

Here's what I found for the origins of koi.

https://www.google.com/url?sa=t&sou...Vaw3qe6lAbhZdwTxRkDEiEqTR&cshid=1593378452493

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https://www.google.com/url?sa=t&sou...Vaw2Yw0-oV85AE7ky-E-imZhI&cshid=1593378588348

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These are just a few of the handful of sites I looked at for the origin of koi and they pretty well all suggest that koi originated from the common carp. Btw this only took me 5 mins to look these up on Google.

https://www.google.com/url?sa=t&sou...Vaw3zcTTLsGuUYfRsRpuu5eGJ&cshid=1593378819657

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[Magnus_Bane]

THIS ABSOLUTELY THIS. Amur carp or grass carp have extremely different head shapes to koi, which are basically the common carp.

From what it said in the sites I listed they came from a color mutation in the common carp which some royalty in China made extremely popular before they invaded Japan. After they left Japan however, rice farmers there decided to keep some of the carp and raise/breed em for food untill they became popular there for their color blotches and then the craze spread throughout Japan and everyone wanted to keep these colorful fish and breed em to get more specific colors/patterns. This all started up long before China ever became one complete nation and was still split into several different sections with each having their own ruler, which were constantly at war with eachother. But like allot of these site mentioned if that the history of koi is a lil bit iffy and should be taken with a grain of salt, I'm sure not everything is a 100% accurate but if multiple sites are come up with the same conclusion there's got to be atleast a bit of truth behind it.

 

[vincentwugwg]

From what it said in the sites I listed they came from a color mutation in the common carp which some royalty in China made extremely popular before they invaded Japan. After they left Japan however, rice farmers there decided to keep some of the carp and raise/breed em for food untill they became popular there for their color blotches and then the craze spread throughout Japan and everyone wanted to keep these colorful fish and breed em to get more specific colors/patterns. This all started up long before China ever became one complete nation and was still split into several different sections with each having their own ruler, which were constantly at war with eachother. But like allot of these site mentioned if that the history of koi is a lil bit iffy and should be taken with a grain of salt, I'm sure not everything is a 100% accurate but if multiple sites are come up with the same conclusion there's got to be atleast a bit of truth behind it.

Koi (Cyprinus rubrofuscus) - Species Profile

Species summary for Koi (Cyprinus rubrofuscus)

nas.er.usgs.gov

 

[L3CTR0N]

From what it said in the sites I listed they came from a color mutation in the common carp which some royalty in China made extremely popular before they invaded Japan. After they left Japan however, rice farmers there decided to keep some of the carp and raise/breed em for food untill they became popular there for their color blotches and then the craze spread throughout Japan and everyone wanted to keep these colorful fish and breed em to get more specific colors/patterns. This all started up long before China ever became one complete nation and was still split into several different sections with each having their own ruler, which were constantly at war with eachother. But like a lot of these site mentioned if that the history of koi is a lil bit iffy and should be taken with a grain of salt, I'm sure not everything is a 100% accurate but if multiple sites are come up with the same conclusion there's got to be atleast a bit of truth behind it.

My reply should have been deleted. I went off to do more research and yes Vincent Wu is right. They did originate from Amur carp, cyprinus rubrofuscus, the Chinese populations specifically. Google decided to misinform me by saying the Amur carp was synonymous with grass carp, which I now know is clearly not the case. I should have done more research instead talking out of my rear. Sorry.

tldr google confused me by saying that amur carp is the same as grass carp

 

[vincentwugwg]

My reply should have been deleted. I went off to do more research and yes Vincent Wu is right. They did originate from Amur carp, cyprinus rubrofuscus, the Chinese populations specifically. Google decided to misinform me by saying the Amur carp was synonymous with grass carp, which I now know is clearly not the case. I should have done more research instead talking out of my rear. Sorry.

tldr google confused me by saying that amur carp is the same as grass carp

Thank you for 'manning up' .. most people just would chose to disregard their mistakes. I make plenty of mistakes myself but I will admit when I've made a mistake or when the wrong information is passed along. We are all here to learn and move the hobby further along.

 

[WalksWIthGobies]

goldfish and koi are from different lines of carp... goldfish were from the common carp whereas koi are from amur carp which are naturally found in southeast asia=tropical

Koi are not tropical fish. Not all of Asia is tropical, not even all of Southeast Asia.

 

[redswordz]

Koi are not tropical fish. Not all of Asia is tropical, not even all of Southeast Asia.

Koi can thrive in tropical countries. I'm from a southeast Asian country and all of southeast Asia countries are tropical. we only have rainy and summer season. I've seen a lot of koi ponds both in my country and from other southeast Asian tropical countries I've visited, all of those ponds are thriving with all the koi. vincet wu is right, get your facts checked bruh

 

[Magnus_Bane]

Koi can thrive in tropical countries. I'm from a southeast Asian country and all of southeast Asia countries are tropical. we only have rainy and summer season. I've seen a lot of koi ponds both in my country and from other southeast Asian tropical countries I've visited, all of those ponds are thriving with all the koi. vincet wu is right, get your facts checked bruh

He is right tho, most of Asia isn't tropical. Granted I'm not saying Vincent wu is wrong either but most of Asia is primarily a temperate climate zone just like most of the US. It's mostly the coast lines that are sub-tropical - tropical. If we were talking strictly about China or India then yes they would be primarily sub-tropical - tropical, but Asia is an entire continent filled with dozens of countries that have a very wide range of climates and biomes.

But yes over all, koi should do just fine in tropical-temperate climates either way. They are extremely tough and resilient fish that adapt very easily to new environments.