8 Reasons to Keep Fish

8 Reasons to Keep Fish Banner

It may be surprising to know that fish are the third most popular pet to keep, after dogs and cats.

According to the National Pet Owners Survey 2021-2022, 70% of American households own a pet.

The survey which was conducted by the American Pet Products Association (APPA) found that 11.8 million US households keep freshwater fish and 2.9 million keep saltwater fish.

Freshwater fish account for the largest proportion of pets owned across the US, there are over 139.3 million freshwater fish in comparison to 94.2 million cats and 89.7 million dogs.

So why are fish such a popular choice of pet?

Health Benefits

You may be surprised to hear how many health benefits there are from keeping fish.

Have you ever wondered why so many doctors, dentists and therapists have fish tanks in their waiting rooms?

This isn’t just by chance. There is plenty of research to show that keeping fish or even just watching them for a short period of time can bring health benefits.

The four main health benefits of keeping fish are; reducing stress, reducing blood pressure and heart rate, and improving behaviour and eating habits of those who suffer with Alzheimer’s.

Reducing Stress

Dr. Schwartz maintains that aquariums have a similar soothing effect to “the sound of the ocean waves, rain storms, and running streams that is mesmerizing as well as relaxing”.

Studies carried out in the 80’s proved that aquariums help to reduce patient’s anxiety levels by up to 12%.

Perhaps it’s because as humans, we so heavily rely on water as part of our existence, that we are automatically and instinctually comforted when we are close to water.

Lowering Blood Pressure and Heart Rate

Watching FishesPlymouth University and the University of Exeter found that watching fish in aquariums “led to noticeable reductions in participant’s blood pressure and heart rate”.

Watching fish, either in your own home fish tank or at the aquarium can help you to feel calm and de-stress.


Another study carried out in the 90’s found that when exposed to brightly coloured aquariums, people who have Alzheimer’s disease have reduced disruptive behaviours and an increased appetite.

This study promoted the use of fish tanks in care homes across the world.

They’re Quiet

Although our beloved cats and dogs are the most popular household pets, they can make a lot of noise.

This noise can come at the most inconvenient times.

Unlike other pets, fish are completely silent. Not a sound, ever.

So if you have a young family they could be the perfect pet for you.

While we’re on the topic of young families, this leads us nicely onto our next reason to keep fish…

Learning Opportunity for Children

Little boy in the aquariumKeeping fish is a fantastic learning experience for children.

Learning to look after a small animal can teach them how to be responsible, and the importance of caring for everything on our planet, no matter how small.

Your children will learn valuable skills through feeding, caring for the fish and maintaining the fish tank. Although maintenance for fish isn’t as time consuming as it is for dogs and cats, it is a good amount of time for children to stay involved and interested.

Fish can quickly become a part of your family; some fish will even interact with you and are very playful.

There is also the inevitable death of a fish and since death is an unavoidable part of life it is a helpful way to teach your children about death and how to deal with it.

Related Reading: Best Fish for Kids

They Don’t Take up Much Space

In addition to not making any noise, they also don’t take up much space.

Perhaps one of the reasons they are growing in popularity as an ideal pet, is that our homes are getting smaller due to the increased cost of living. Many families now live in flats or small homes in which it’s just not appropriate to have a larger animal like a cat or dog.

To keep a fish doesn’t require much space. You’ll need a place for the fish tank, and perhaps a small cupboard or box to store all your fishkeeping accessories in.

Depending on how many fish you decide to get, you may only need a shelf or surface to place your fish tank on.

We do always urge people to do their research into the size of the tank before buying one. Typical small goldfish bowls are not suitable for any fish.

We recommend a 5 gallon tank as the absolute minimum size you should have to keep any species of fish in.

They’re Cheaper Than Other Pets

In comparison to other animals, fish keeping is a relatively inexpensive hobby. The cost depends on the breeds you decide to keep, obviously the fancier you go, the more expensive the hobby becomes.

The American Society for the Prevention of Cruelty to Animals found that a small dog will cost you $1,471 per year, in comparison to $227 for a small fish.

They Don’t Require Much Maintenance

Maintenance of AquariumYou don’t have to buy expensive gizmo’s to keep your fish entertained, they don’t need to be walked, or entertained. In fact they do most of the entertaining for us.

They are very independent, and don’t suffer from anxiety when we leave them.

This also means it’s usually quite easy to find someone to care for them when you’re on holiday.

With regards to caring and maintaining the fish tank, this will require some time commitment. You’ll need two 5 minute feeding periods per day, you’ll also need to allow half an hour per week to change 10-15% of the water and do any cleaning (algae and gravel).

Rewarding Hobby

In a survey carried out by APPA, it was found that 34% of households that keep fish say they consider keeping fish to be a rewarding hobby.

In this particular survey, that is the highest percentage in comparison to other pets such as birds, in which only 22% of bird keepers keep birds as a hobby.

Keeping fish has become a great hobby for many people over the last few decades. People take great pride in their tanks and their collections of fish, and some enthusiasts also breed fish.

Fish tanks can become the focal point of a room, and also a point of conversation with visitors.

Aesthetically Pleasing

Beautiful TankPerhaps one of the most common reasons people want to keep an aquarium, is that they look beautiful.

They promote feelings of calm and peacefulness, fish tanks can be an attractive addition to any home.

Fish come in a vast variety of shapes, sizes and colours, and just watching them for a few minutes a day can help to relax you and connect you to nature.

A Balanced View

We always like to be realistic when discussing anything fish related and it’s important to know that fish keeping is not all fun and games.

There are some aspects of fish keeping which are hard and there are a number of drawbacks.

American Pet Products conduct annual research on pet satisfaction, and their latest one shows the drawbacks of fish keeping, and the percentage of households who consider each point to be a drawback.

Drawbacks% Of Owners Who Agree
Cost for food, care and medicine16
Finding care while away from home20
Health problems40
Sadness when they die/die too easily23
Too great a responsibility8
Veterinarian not knowledgeable7
No drawbacks to ownership16

You may noticed that most of the percentages are quite low, which suggests that there aren’t too many drawbacks to fish keeping, 16% of owners actually agree there are no drawbacks at all.

The most common drawbacks are algae build up and cleaning, and health problems.

Unfortunately, health problems are prevalent throughout all pets, however tank maintenance and cleanliness can go a long way to reduce health risks for fish.

There are ways you can reduce algae build up, for example keeping your fish tank away from a window. And although 38% of fish owners believe the cleaning to be a drawback, in comparison to other animals the time spent cleaning and maintaining is actually very little.


If you’ve read this article in preparation for buying an aquarium and some fish, it’s likely that your mind will be made up. Make sure to read 8 Beginner Fishkeeping Mistakes.

Fish can help with many health benefits, including stress and reducing your blood pressure. They are relatively easy to care for, and one of the cheaper pet options. They don’t take up much space, or make much mess.

Now you’ve finished reading both the reasons to keep fish and some of the drawbacks to fish keeping, let us know why you keep fish in the comments section below…

About Robert 468 Articles
Robert Woods is the creator of FishKeeping World, a third-generation fish keeper, and a graduate in animal welfare and behavior. He is also a proud member of the Association of Zoos and Aquariums, the Marine Aquarium Societies of North America, and the Nature Conservancy.


  1. Jennifer Galanis says:

    What fish would be great for a special needs classroom? What size tank? I want to have a tank that is beautiful to look at with color and that soothes the children watching them. 3-5 graders

    • Fishkeeping World says:

      Hi Jennifer, depending on how much space you have there are a few different options. If you don’t have much space, get a 5 gallon tank with a single male Betta. They are beautiful fish with long flowing fins and very captivating to watch. If you have a bit more space and want a group of fish, you could get a ten gallon tank with a group of 6 guppies. They’re smaller than Bettas but equally as colorful and are bred in a variety of patterns. Both of these fish are hardy and fine for beginners too. We have articles on both species on our website to help you set up their tank and learn a little bit about them which might be fun for your students. Thanks, Robert

Leave a Reply

Your email address will not be published.