How Long Can an Oscar Fish Go Without Eating?

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Written By Fun Fish Tanks

I Love my Fishes 

Oscar fish are especially charming with their intelligent demeanor and striking appearance. Aquarium enthusiasts find this fish endearing because of its personable nature. These adorable aquatic animals are nicknamed ‘water dogs’ because they swish their tail when the owner gives them their favorite food. The stunning black and orange fish is truly unique and is popular amongst aquarists for good reason. If you are starting out with an Oscar fish, you might wonder how long can these fish go without food.

A young but healthy oscar fish can survive without eating food for 10 days. However, if you’re dealing with an adult oscar fish, it can survive anywhere between 2 to 4 weeks without eating. However, how long an oscar can go without eating food depends on the health and the age of the fish. If your Oscar fish hasn’t eaten anything for a few days, don’t be alarmed. Instead, try to find out the reason why it has stopped eating.

How Long Can You Leave Oscar Fish Without Feeding Them?

You can leave your Oscar fish for anywhere between ten days to one month depending on its age and health. If the fish is immature, you can safely leave it for ten days. However, if you’re leaving a more mature Oscar, it can survive without food for two to four weeks on average. You don’t have to worry too much if you’re leaving for a few days. The Oscar is a very hardy and resilient fish that won’t trouble you much if you’re going on a short vacation.

Why Has My Oscar Stopped Eating?

An Oscar fish may stop eating due to different reasons. Either it is just bored with the food, or there is something wrong with its health. If the conditions in the aquarium do not suit the aquatic animal, it might stop eating as well. Other than that, it is also possible that the food you are serving the fish has gone stale. Therefore, the exact reason why your pet Oscar has stopped eating can only be identified if you do a little investigation.

If your Oscar hasn’t eaten something in the last week, don’t be too anxious about it. Your Oscar doesn’t have to eat something every day as a human does. It can subsist on lower levels of food. Don’t waste food by overfeeding it every single day. If you’re still worried, try experimenting with the food that you serve it. The same food can become too monotonous for it. Consider tempting it with appetizing foods like bloodworm and brine shrimp so that it starts eating again.

If you suspect that your Oscar is unwell, try to figure out what is wrong with it. There is a chance that it might be impacted by parasites. However, if you aren’t able to understand what is wrong with it, consider contacting a fish store or veterinarian near you.

How To Feed Oscar When You’re On Vacation?

If you go on a long vacation, you might want to know a safe way to feed your Oscar while you’re away. There are three options that you have in such a situation. Either you can request a family member or a friend to feed the fish in your absence. Otherwise, you can invest in an automatic fish feeder. Finally, you can even choose to purchase some slow-release fish food. You have many options to feed your Oscar so that it doesn’t go without eating for a long time.

So How Long Can an Oscar Go Without Eating?

Oscars are hardy aquatic animals that do not need to be fed every single day. Sometimes, they can stop eating for two to three days and start again. If you are going to be away, your young Oscar fish can survive up to 10 days. However, if you have an older Oscar fish, it can survive for even longer. In fact, according to estimates, a mature Oscar can live without food for 2 to 4 weeks assuming that it is healthy.


The Oscar fish is a popular freshwater species that is adored by aquarists because of its resilience. Raising one is easy and you can even go without feeding it anywhere between ten days and a month. If your Oscar is healthy but young, it can survive without food for ten days. However, if it has crossed its maturity, it can survive up to 2 to 4 weeks.

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