Can Angelfish Live With Koi? Here’s What You Should Know


Angelfish and Koi are some of the most popular fish to keep for those who want to have ponds or aquariums in their home. But, as much as you would want to have two of the best pet fish types living together in one and the same habitat, you might want to reconsider that idea because of the nature of both the Angelfish and the Koi. So, can Angelfish and Koi live together in one and the same habitat?

Angelfish and Koi shouldn’t live together in the same tank or pond. While there is a chance that the Koi could end up becoming aggressive towards the Angelfish, the main concern here is that these fish require different temperatures to live healthily and should be kept in different habitats.

It might look spectacular for you to keep these fish together in the same tank but you do have to understand that they have different requirements. On top of that, both the Angelfish and the Koi can be aggressive towards other fish that don’t come from the same species.

That’s why you have to know more about Angelfish and Koi for you to understand how to keep them and for you to have an idea why you shouldn’t be keeping them in one tank or pond in the first place.

What Kind Of Fish Is Angelfish?

Angelfish are some of the most popular types of fish to keep as pets in tanks because of how beautiful they are. But they aren’t always the easiest fish to keep especially if you don’t know a lot about them. As such, here are some of the facts you should know about Angelfish:

They Can Grow To Nearly A Foot Long

For pet fish, Angelfish can actually be bigger than a lot of other fish types that are kept as pets. That’s because they can grow up to nearly a foot long and are more likely to be close to 10 inches in terms of length.

Of course, that is only true if you are keeping them in large tanks that will allow them to have enough space to grow. In most cases, Angelfish are only about half a foot long.

Can You Keep Angelfish Together With Other Fish?

You may have seen Angelfish living together with other fish harmoniously and without problems. That’s because Angelfish are considered community fish that can be kept with other fish types. But that is most likely true when the Angelfish are still young and small.

As the Angelfish gets older and bigger, it will develop aggressive and territorial tendencies that may endanger smaller types of fish. The males can even get aggressive with one another during the breeding season.

That’s why to minimize the chances of your Angelfish putting up a fish fight club in the tank, it is best to keep them together with their own kind and away from other types of fish.

Angelfish Are Omnivores

Like most fish, Angelfish are omnivores that enjoy a wide variety of different foods that range from live foods to greens such as plants. That’s why knowing what to feed Angelfish won’t be too tough as they will most likely eat anything they can find so long as it is edible to them.

However, because Angelfish will most likely eat anything, this can be quite dangerous for other fish especially considering that Angelfish will also eat smaller fish. That means that, if you are keeping smaller types of fish such as guppy, there’s going to be a good chance of your Angelfish going after them.

There is even a chance of your Angelfish eating smaller and younger Angelfish that are small enough to fit inside the adult’s mouth.

It Is Best To Keep Angelfish In Warmer Waters

If you are keeping Angelfish, you should make sure that they are living in a tank that is warm enough but not too hot. That said, Angelfish require water temperatures of somewhere between 74 degrees F to 78 degrees F. But, whenever they are spawning, the water temperatures should be somewhere close to 80 degrees F.

What Kind Of Fish Is Koi?

Similar to Angelfish, Koi are also quite popular among pet owners especially for those who have ponds because of how Koi are perfect for such habitats. However, here are some facts that you need to know for you to make sure that you are able to take care of your Koi well enough:

Koi Are Big Fish That Can Grow Up To Three Feet Long

It isn’t a secret that Koi are quite big for pet fish as they can grow up to three feet long. However, most Koi are usually only about two feet long. Still, two feet is still pretty big for a pet fish as they can simply outgrow any other type of fish you can keep in a water tank or in a pond. The size of a Koi is also the main reason why they are usually kept in ponds rather than in aquariums or water tanks.

Some Koi Can Outlive Their Owners

Koi can live for decades and have longer lifespans in comparison to other pet fish types. In Japan, where they originate from, they usually live an average lifespan of 40 years while those in the US often live for up to 20 years. However, there was a legendary Koi that once lived for more than 200 years.

Koi Can Be Aggressive

In most cases, Koi are gentle fish that won’t bother other fish that live together with them. However, when they live in poor conditions and when they are placed in environments that aren’t ideal for them, Koi can be quite aggressive towards other fish and will actually bully them.

And when they don’t get to eat enough, Koi can be opportunistic feeders that will eat smaller fish that they can swallow whole with their big mouths. That means that you should make sure to keep your Koi in ponds that have ideal conditions or that you keep them away from smaller fish.

It Is Best To Keep Koi In Colder Waters

Speaking of ideal conditions, Koi thrive best when kept in deep and colder waters and love to stay away from the sun because they are susceptible to getting sunburn. Ponds are ideal for them especially if you live in colder climates as they will allow the Koi to stay deep underwater while enjoying the cold waters.

It is best to keep Koi in waters that have temperatures between 59 degrees F to 77 degrees F but make sure to keep them away from winter temperatures that are below 50 degrees F.

Can Angelfish And Koi Live Together?

Now that we know enough about Angelfish and Koi, let us go back to the question of whether or not you can keep both of these fish together in the same habitat. Well, the answer is that it is best to not keep them together in one place because of how they both have different living conditions.

Angelfish thrive in warmer waters that can reach 80 degrees F. On the other hand, it is best to keep Koi in colder waters that have temperatures as cold as 59 degrees F.

You should also consider the fact that Koi prefer to be kept in ponds that are deep so that they can avoid the sun and so that they will have enough space to grow. Meanwhile, Angelfish should live well in water tanks that are also quite spacious but there is no need for them to be placed in ponds.

Angelfish and Koi
Angelfish and koi live together

Of course, because Koi are much larger than Angelfish, there is a chance that they will keep the Angelfish from eating well because of how their size will allow them to simply take the Angelfish’s share of food.

If you are interested in learning more about your fish behavior, check out the links below:

Can Koi And Angelfish Be Mean To Each Other?

While Koi are generally gentle fish, they can be mean to other species of fish especially if the conditions are not ideal such as when they are not kept in cold waters or when they are not fed properly. Meanwhile, Angelfish that are mature and older tend to be quite territorial in nature but, despite how territorial and aggressive they can be, they are no match for the size of an adult Koi.

That said, if you are not feeding your Koi well, there is a chance that they will end up eating smaller fish such as Angelfish as they can simply overpower them with their size. On the other hand, adult Angelfish may not be able to do anything against adult Koi despite how aggressive and territorial they may be but they can bully and eat Koi fry that are much smaller than them.

All those things considered, it might not be a good idea for you to keep Angelfish and Koi in the same environment. That’s why you might want to keep your Angelfish in a separate fish tank while investing in a pond for your Koi.

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