Do Koi Eat Other Fish?

Do koi eat other fish? And do they eat goldfish?

Many first-time koi keepers wonder about the possibility of keeping other coldwater fish such as goldfish alongside their koi.

One of the most important elements of keeping a healthy, happy pond is ensuring that all of the pond’s residents get on well with each other… and will not eat each other!

So, if you’re wondering whether koi eat other fish and if it’s safe to keep goldfish and koi carp together, this article will answer all of your questions…

What do koi carp eat?

The koi carp is an omnivorous fish, which means that koi will eat both plants and animal matter. In the wild, this will consist of a large variety of foods, including algae, plants, flies and bugs, and decaying organic matter.

Will my koi try to eat my goldfish?

The koi carp and the goldfish are actually fish from the same species family, and while there are of course significant differences between them, they also have a lot of similarities. But this won’t stop larger fish from trying to eat smaller ones!

Do koi eat other fish?Koi carp are unlikely to eat other large fish, including large goldfish. However, if something will fit in their mouths then they may well try to eat it! So smaller goldfish will be at risk.

Koi will also eat fish eggs. So if your goldfish or koi lay eggs within the pond, your koi may potentially see these as a fair meal!

What if your goldfish are disappearing from your pond?

If you notice that your goldfish are not surviving alongside your koi or seem to be disappearing from the pond – and if your goldfish are small enough to fit in the koi’s mouth – then it may be that your koi are eating them. However, there are other possible explanations for your goldfish disappearing…

Firstly, koi ponds are almost always large and deep. If your fish are swimming near the bottom then it is certainly possible to simply not see them.

Secondly, predators such as herons, other wading birds and even dogs and cats could be responsible for eating your goldfish.

Learn more about koi carp…

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