Can Angelfish Live with Oscars

Consider getting a tankmate if you already have an angelfish aquarium. If this is the case, you might wonder, ‘Can Angelfish live with Oscars?’. If this is the case, pay attention to the article. We all know that Angelfish and Oscars are both popular choices among fish enthusiasts because each has its own unique sets of characteristics & requirements.

Therefore, if you want to understand the compatibility between these two species, read this article thoroughly. In this article, I’m not only going to answer ‘Can Angelfish live with Oscars’ but also delve into the natural habitats’ behavior patterns and specific needs to understand the compatibility of both species. But before I tell you all this, let’s begin with knowing ‘Can Angelfish live with Oscars?’.

Can Angelfish Live With Oscars?

Can Angelfish Live With the Oscars?

No, Angelfish & Oscar can’t live together in the same tank. Angelfish & Oscar both differ significantly in terms of their Natural habitat and behavior. Even though some experts & Aquarists claim that they can exist peacefully in the same tank, it’s not always true.

Angelfish can be territorial, especially during breeding periods, whereas Oscars are known for their aggressive & territorial tendency. The aggression of the Oscars makes them incompatible with Angelfish.

You should know that Angelfish & Oscar both are generally found in fish water, lakes, and streams. Hence they are usually compatible with the varieties of tank mates but not for each other.

Both species require ample space and careful selection of tankmates to ensure a harmonious tank environment. Also, if you need to pay attention to the size difference between both species, you will notice a fascinating insight.

Yes, Angelfish & Oscar exhibit notable differences in sizes. For instance, Angelfish typically grow to an average size of 4-6 inches, whereas Oscars can reach up to an impressive length of 14 inches or even larger depending upon their subspecies.

It is also important to consider this kind of size disparity when keeping them together because larger fish may harass or intimidate smaller ones, posing a threat.

In addition, the water perimeter is another aspect you need to consider because it plays a huge role in the health & well-being of aquarium fish. According To RateMyFishTank, Angelfish prefer acidic to neutral water with a pH range of 6.5 & 7.5, similar to Oscars.

Regarding the temperature range both species prefer, keeping them between 74-81 degrees Fahrenheit is best. Also, you must maintain this stable temperature range inside their tank water throughout the year to keep them healthy & vitality.

Also, there are a few other factors that you must consider before attempting to captivate Angelfish & Oscar together in the same tank. You need to consider this in your account to ensure a successful cohabitation. Therefore let’s take a quick look at three of the major factors everyone should consider when it comes to keeping Angelfish & Oscar together in the same tank.

3 Factors to Consider

Before attempting to house Angelfish & Oscars together, several factors should be takenconsiderednsure a successful cohabitation.

Tank Size

First of all, both species required adequate space to swim & thrive. If you give Angelfish or Oscar the proper amount of space, they may feel relaxed. You can keep a pair of Angelfish in as small as 20 gallons, but a larger tank, like 30-55 gallons, is recommended to accommodate their vertical swimming habits.

On the other hand, Oscars grow large and tend to be active in Nature, making them impossible to accommodate in a 20-gallon tank. Again, you must invest a minimum tank size of 55-75 gallons to house Oscars & Angelfish together’. If it’s a smaller tank, there can be conflicts, injuries & even death due to competition for resources, territories, and mates.

Also Read: Can Angelfish Live With Tetras?

Tank Setup

You must pay attention to creating a suitable tank environment for the cohabitation of Angelfish & Oscar together. If you are not providing plenty of hiding spots and vertical structures to promote foraging behavior, your Angelfish & Oscar may feel disturbed, stressed, and bored.

It is recommended to have at least driftwood, rocks, and tall live plants for Angelfish to retreat and establish their territory. If you have ever owned Oscars, you might know about their destructive behavior and prone to rearrange the tank decor.

I advise you to always go with a sturdy decoration that can withstand Oscar’s activity. It is best to ensure a balanced ecosystem with compatible plants like Java ferns or Amazon swords, which enhances both species’ aesthetics and well-being.

Also Read: Can Angelfish Live With Gourami?

Tank Mates

If you are considering tankmates for your Oscar or Angelfish, it’s crucial to select very compatible species in terms of size, temperament, and water requirement. Regarding Angelfish, you should use suitable tanks that include peaceful community fish like tetras, gouramis, or corydoras catfish.

On the other hand, more aggressive Oscars are best kept with similarly robust species like cichlids, plecos, or silver dollars. However, make sure to do careful consideration & research, which must be undertaken to ensure the best tankmates for Angelfish that are capable of coexisting harmoniously.

Also Read: 7 Bad Tank Mates For Angelfish

Possible Challenges & Risks

As I told you, you should think of keeping Oscar & Angelfish together in a different tank, as it may lead to territorial disputes & conflicts over resources and competition for shelter. Also, cohabiting Angelfish & Oscar can present you with certain challenges and risks that you must address to maintain a healthy tank environment. 

Aggression & Territorial Issues

According To University of Florida, Oscars are known to be very territorial & aggressive By Nature. Therefore, it is not uncommon for them to exhibit dominance as well as territory, particularly during breeding or when establishing their hierarchy.

This behavior can quickly lead to aggression toward smaller or more peaceful Angelfishes. Therefore if you notice any signs of aggressiveness or stress in Angelfish, like nipping, chasing, or increased hiding behavior, you need to quarantine & separate that vulnerable fish immediately in a separate tank. You must closely monitor the interaction between these species and always be prepared to separate them whenever necessary to avoid any potential harm.

Also Read: Can Angelfish Live With Bettas?

Feeding Problem

Angelfish & Oscar tend to have different dietary needs, making them incompatible. Angelfish are known to be omnivorous and require a balanced diet consisting of high-quality flakes and pellets, as well as occasional live or frozen foods like brine shrimp or bloodworms.

On the other hand, Oscars are known to be carnivorous and prefer a high protein diet and can be fed a diet of pellets, live or frozen foods like earthworms, small fish, or shrimps. You must follow proper feeding schedules and implement portion control to prevent overfeeding or dietary imbalances.

Therefore, keeping them together in the same tank can be very problematic & challenging when it comes to feeding them. So, it’s best to avoid keeping them together in the first place.

Also Read: Can Angelfish Live With Apistogramma?

5 Recommendations & Tips

If you want to ensure the well-being of Angelfish & Oscar both, consider following the recommended tips mentioned below. All the tips will help you keep your fish happy, healthy, and thrive for longevity.

  1. Separate Tanks: I recommend that you always keep Angelfish & Oscar both in separate tanks due to their significant differences in size, behavior, and care requirements to minimize aggression & stress. This will further allow each species to thrive independently without interfering with each other’s livelihood.
  2. Compatible Tank Mates: if you want to keep Angelfish & Oscar together, consider selecting compatible tank mates that can withstand their respective behaviors and requirements. I usually like to carefully Research and choose the one that is known to peacefully coexist in terms of size, temperament, and environmental needs.
  3. Lighting & Others: Ensure you also set up some lighting to mimic natural day & nighttime. It will help you keep your fish’s metabolic rate growth and health at its best. Also, make sure to use compatible equipment to enhance the aquarium & water quality.
  4. Observation and Monitoring: Regularly observe your angelfish tank and monitor their interaction. You should also pay attention to any signs of stress or aggression to be prepared and separate the fish if necessary to avoid injuries or fatalities.
  5. Feeding Schedules & Portion Control: As I told you early, you should establish an appropriate feeding schedule for both species. This will ensure they receive a balanced diet suitable for their nutritional requirements. Also, it would help if you never overfed Angelfish or Oscar to maintain optimal health and prevent water quality issues. It’s best always to clean up the uneaten food from the water.


Even though Oscars & Angelfish tend to have distinct characteristics & requirements, many people keep them together. Also, a few experts and Aquarists claim that both species can cohabitate together with careful consideration & management.

This is quite possible, but it’s not generally recommended. It is best if you keep both these species separated in their individual tanks due to the differences in behavior, size, and care requirements.

However, if you plan to keep them together, it is best to be prepared to monitor them closely whenever they interact. Also, make sure to provide them with a suitable environment that caters to the needs of both species.

Remember that the well-being & happiness of your fish is the ultimate top priority to create a thriving & harmonious aquarium environment that lasts many years. I have given my best to give you in-depth knowledge on the question:

‘Can Angelfish live with Oscars?’. If you find this article helpful, then consider sharing it. Your share will help many people learn about the compatibility between Angelfish & Oscar and ‘Can Angelfish fish live with Oscar.’ Do check my other helpful guide on angelfish facts & care. See you in the next post, till then, take care & goodbye.