Are you a new fish owner who just brought home your colorful aquatic friend from the pet store? Or perhaps you’re considering buying a fish but wondering how long it can survive in its plastic bag during transportation. Well, if these questions have crossed your mind, then this post is for you! We’ll be discussing one of the most common concerns among fish owners – How long can fish live in the bag from the pet store? So buckle up and let’s dive into some useful information that will help ensure your beloved finned friends stay healthy and happy.

Types of Fish

The average lifespan of a pet fish is two to five years. However, some fish can live much longer than that if they are well cared for. The type of fish you have will play a big role in how long it can live. Some species of fish are known to be particularly long-lived, while others have shorter lifespans. Here is a look at some common types of pet fish and how long they typically live:

Goldfish: Goldfish are one of the longest-lived pet fish, with an average lifespan of 10 to 15 years. However, there have been reports of goldfish living for over 20 years. They are relatively easy to care for and do not require a lot of space, making them a popular choice for first-time fish owners.

Angelfish: Angelfish are another long-lived type of pet fish, with an average lifespan of 10 to 15 years. They are a little more challenging to care for than goldfish, but can still be kept by beginner aquarists if they do their research.

Oscar fish: Oscar fish are known for their feisty personalities and can reach up to a foot in length. They have an average lifespan of 10 to 15 years and require a large tank with plenty of hiding places. Oscars are not recommended for beginners due to their high level of care requirements.

Discus fish: Discus fish are beautiful creatures that come in many different colors and patterns. They have an average lifespan of 10 to 12 years and are more challenging to care for than other types of pet fish.

Guppies: Guppies are the most popular type of pet fish due to their colorful appearance and hardiness. They have an average lifespan of two to three years and do not require a lot of maintenance, making them perfect for beginner aquarists.

Koi fish: Koi are large, ornamental fish that are known for their vibrant colors and long lifespans. The average lifespan for koi is 25 to 35 years, although there have been reports of some living as long as 40 or 50 years! They require large tanks with plenty of space and require more advanced care than other types of fish.

What type of fish are you buying?

There are many factors to consider when purchasing fish, and one of the most important is the type of fish you are buying. There are freshwater fish and saltwater fish, and each type has its own unique needs. Freshwater fish include guppies, goldfish, and bettas, while saltwater fish include clownfish, angelfish, and triggerfish. It’s im an average lifespan of 5 to 10 years and require a larger tank with plenty of space and hiding places. Discus fish are not recommended for beginners due to their high level of care requirements.

Koi fish: Koi fish are some of the most beloved pet fish due to their beautiful colors, large size, and amazing personalities. They have an average lifespan of 15 to 20 years if given proper care and can reach up to 3 feet in length. Koi fish require a large pond or tank with plenty of space and hiding places, making them best suited for experienced aquarists.portant to do your research on the type of fish you’re interested in before making a purchase, so that you can ensure they will have a long and happy life in your care.

Life Expectancy

The average lifespan of a fish in captivity is between 3 and 5 years. However, some species of fish can live much longer in the right conditions. For example, goldfish have been known to live up to 40 years in captivity, while koi have been known to live up to 100 years.

When fish are first brought home from the pet store, they are typically placed in a small bowl or tank. This is not ideal for long-term care, as most fish need at least 10 gallons of water per fish to thrive. Overcrowding can cause stress and shorten lifespans, so it’s important to upgrade to a larger tank as soon as possible.

In terms of water quality, you’ll need to do regular water changes and make sure the pH is balanced. Ammonia and nitrites should be at zero, and nitrates should be below 20 ppm. A good rule of thumb is to change 25-50% of the water every week.

As for food, it’s important to give your fish a varied diet that includes both pellets and live/frozen foods. Feed them 2-3 times per day, but only give them as much as they can eat in 3 minutes or less.

Factors That Affect Longevity

There are a number of factors that can affect the longevity of fish in a bag from the pet store, including the type of fish, the size of the bag, the amount of water in the bag, and the temperature of the water.

Type of fish: Some fish are more resilient than others and can live for longer periods of time in less than ideal conditions. For example, goldfish are hardy fish that can withstand a wide range of temperatures and oxygen levels. On the other hand, bettas are very sensitive to their environment and require pristine conditions to survive.

Size of bag: The larger the bag, the more water there is available for the fish to swim around in and stay oxygenated. A small bag with little water is going to be much more stressful for the fish and will reduce its lifespan.

Amount of water: In addition to the size of the bag, it’s important to make sure there is enough water in the bag. If there isn’t enough water, it will quickly become stagnant and low in oxygen, which can kill fish very quickly.

Temperature: The temperature of the water is also important, as different species of fish prefer different temperatures. Goldfish do well in cooler waters while bettas prefer warm waters. If the water is too cold or too hot, it can cause stress for the fish and lead to a shorter lifespan.

How to Prolong the Life of Your Fish?

When you buy a fish from a pet store, it is important to take some steps to ensure that your fish lives a long and healthy life. Here are some tips on how to prolong the life of your fish:

  1. Get a larger tank. A larger tank will provide more space for your fish to swim around and will also help to stabilize the water temperature.
  2. Do not overfeed your fish. Overfeeding can lead to water pollution and also puts your fish at risk for health problems.
  3. Keep the tank clean. Regularly clean the tank and do a partial water change every week or two. This will keep the water quality high and prevent build-up of toxins in the water.
  4. Provide hiding places. Include some rocks, plants, or other objects in the tank for your fish to hide behind if they feel stressed or intimidated. This will help them feel more secure and reduce stress levels.
  5. Handle your fish gently. When you need to handle your fish, be sure to do so gently and carefully so as not to damage their delicate fins or scales.

Does the store keep the fish in a good environment?

The store should keep the fish in a good environment that is similar to their natural habitat. The water should be clean and well-oxygenated, and the temperature should be stable. The fish should also have plenty of space to swim around.

How to acclimate your new fish to your home?

When you’ve made the decision to add a fish or two to your home, it’s important to take the time to acclimate them properly to their new environment. This will help reduce stress for the fish and make sure they have a long and healthy life in your care.

Here are some tips on how to acclimate your new fish:

  • Start by floating the sealed bag of fish in your aquarium for 15 minutes. This will allow the water temperatures to equalize.
  • After 15 minutes, open the bag and very slowly add 1 cup of aquarium water to it every 5 minutes. Continue this process for 30 minutes.
  • After 30 minutes, release the fish into your aquarium. Be sure to discard the water from the bag.

How long do different types of fish live?

Most types of pet store fish have a lifespan of 2-5 years. However, some species of fish can live much longer. For example, goldfish have a lifespan of 10-20 years and koi have a lifespan of 20-30 years. Some other common types of pet store fish and their estimated lifespan are:

  • Betta fish: 2-4 years
  • Clownfish: 3-5 years
  • Guppies: 2-3 years
  • Swordtail: 3-5 years

    Of course, the actual lifespan of a fish will depend on many factors, including the quality of care it receives. Generally speaking, however, most types of pet store fish will have a relatively short lifespan of 2-5 years.


Fish can be a great pet to own, but it’s important to remember that they require a certain level of care. The amount of time that fish can live in the bag from the pet store varies depending on several factors such as temperature and water quality. To make sure your fish stay happy and healthy, it is important to move them into an appropriate tank with proper filtration as soon as you get home. With the right setup and some TLC, your new buddy could be around for many years!