T, close-up shot of a goldfish's face in a fish tank, its mouth wide open and seeming to contemplate a smaller fish swimming nearby

Does My Goldfish Can Eat Other Fish In Aquarium? – A Fact Check

Do you have a curious goldfish in your aquarium? Are you wondering if it is safe for them to eat other fish? You’ve come to the right place!

In this article, you’ll find out what fish goldfish prefer to eat, if they can eat other fish in aquariums, and the potential dangers.

Additionally, you’ll learn what else goldfish can eat, and how to prevent them from eating other fish in aquariums.

Get informed and serve your pet fish better with the facts!

Key Takeaways

  • Goldfish prefer to eat smaller fish in the aquarium, as their diet consists mostly of proteins such as other fish, small invertebrates, plants, and algae.
  • It is generally not recommended to keep goldfish in the same tank as other fish due to their different diets and size requirements, as goldfish can grow much larger and may view other fish as prey.
  • Mixing goldfish with other fish in an aquarium can lead to malnourishment and death of the other fish, as goldfish may out-compete them for food or cause injury.
  • A balanced environment, proper feeding strategies, and careful selection of tankmates are important in preventing goldfish from eating other fish and maintaining the safety and well-being of all fish in the aquarium.

What Fish Do Goldfish Prefer to Eat

Goldfish typically prefer to eat other smaller fish in an aquarium. Their diet consists mostly of proteins, and they feed on other fish, small invertebrates, plants, and algae.

When it comes to their feeding habits, goldfish are opportunistic eaters, meaning they will consume whatever is available.

If you’re keeping goldfish in an aquarium, it’s important to be aware of their dietary needs and provide an adequate fish diet.

Can Goldfish Eat Other Fish in Aquariums

You may wonder if your aquatic pet can consume its tankmates. Generally, goldfish should not be put in the same tank as other fish due to their different diets and size requirements.

Goldfish typically eat small insects, worms, and plant matter, while other fish need a more varied diet that includes other fish, crustaceans, and even mollusks.

Additionally, goldfish can grow up to 10 inches, whereas other fish may only reach 2-3 inches in size. Therefore, it is important to consider your tank size and the fish diet when deciding what fish to add to your tank.

What Are the Dangers of Goldfish Eating Other Fish

Mixing goldfish with other fish in an aquarium can pose a risk to both species. The size of the goldfish and the type of fish it is being mixed with are important factors to consider. Depending on these factors, the goldfish may out-compete the other fish for food. This can lead to malnourishment and eventual death of the other fish. Another risk is that the goldfish may view the other fish as prey, which can cause injury or death to the smaller fish. To ensure the safety of all the fish, it is crucial to research the size and type of fish before adding them to an aquarium.

What Can Goldfish Eat Other Than Fish

In addition to fish, goldfish can also eat a variety of other foods. For a healthy fish diet, it’s important to feed your goldfish a mix of fresh vegetables and high-quality flakes or pellets.

Veggies like frozen peas, spinach, lettuce, and zucchini can all be given to your goldfish as a supplement to their regular diet. Make sure to adjust the quantity of food given to your goldfish depending on the size of the tank.

Too much food can lead to water pollution, so it’s best to only give your goldfish what they can consume in one sitting.

How to Prevent Goldfish From Eating Other Fish in Aquariums

To prevent your goldfish from eating other fish in the aquarium, it’s important to create a balanced environment. Utilize proper feeding strategies, maintain high water quality, and ensure the tank size is appropriate for the number of fish.

Feed only what your goldfish can consume in a few minutes and remove any excess. Regularly check the water parameters to ensure they are within the acceptable range for your species.

Lastly, choose tankmates carefully; goldfish can be aggressive and some species are too small for them to resist.

With the right care, you can keep a healthy and safe environment for all your fish.

Frequently Asked Questions

What Type of Fish Can Live in the Same Aquarium as a Goldfish?

You can keep other fish with your goldfish, but it depends on the tank size and feeding habits. Make sure the tank is large enough, and that the other fish are not fin nippers or aggressive eaters who will take away your goldfish’s food.

How Often Should a Goldfish Be Fed?

Feeding your goldfish correctly is important for their health and tank maintenance. To keep them healthy, plan a regular feeding schedule. Aim to feed them small amounts twice a day and avoid overfeeding. Serve them the right type and quantity of food to help them thrive.

Can Goldfish Survive Without Eating Other Fish?

Yes, goldfish can survive without eating other fish, as long as their diet is balanced and tank size is appropriate. Feed them a variety of foods like flakes, pellets, and live or frozen foods. Ensure their environment is kept clean and free of pollutants. Serve them with love!

How Do You Know if a Goldfish Is Healthy?

To ensure your goldfish is healthy, consider its diet, tank setup, and general behavior. Offer a variety of foods, such as flakes and pellets, and supplement with frozen or live options. Make sure tank parameters stay consistent and keep the water clean. Monitor your fish’s activity, appetite, and color for signs of stress or disease.

What Is the Average Life Expectancy of a Goldfish?

The average life expectancy of a goldfish is 10-15 years, depending on its feeding habits and water quality. Providing a balanced diet and clean, filtered water can help your goldfish live to its full potential.


You have the power to control what your goldfish eats. It’s important to be aware that goldfish can eat other fish, so you need to be extra cautious when housing your goldfish with other fish in an aquarium.

To prevent goldfish from eating other fish, feed them a balanced diet of food specifically designed for goldfish, and avoid overfeeding. Additionally, make sure there is plenty of room for the goldfish to swim and plenty of hiding spots for the other fish in the aquarium.

With careful monitoring and the right precautions, you can successfully keep your goldfish and other fish together in an aquarium.



Meet me, your dedicated author and fish aficionado. With a deep-rooted passion for all things aquatic, I bring a wealth of knowledge, experience, and enthusiasm to this fish and aquarium website. As an avid fishkeeper myself, I understand the joys and challenges that come with creating a thriving underwater world. Through my articles, guides, and recommendations, I strive to provide you with accurate, reliable, and engaging content that will enhance your fishkeeping journey. Join me as we dive into the fascinating realm of fish and aquariums, and together, let's make your aquatic dreams a reality.

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