Facts about Clownfish, Take Care of Your Nemo

Facts about Clownfish Take Care of Your Nemo

Is saltwater a hobby for you? Awesome! You are reading the right article. A saltwater aquarium is fascinating, a combination of eye-catching colorful fish. And here we’ll discuss an amazing saltwater fish. Let’s explore some facts about Clownfish.

Probably you are in a dilemma of where to start and which saltwater aquarium fish should be your first choice. Fret not! Clownfish is one of the best species to begin with.

It is to take care and very hardy; therefore, making it an excellent choice for both beginners and aquarium enthusiasts. However, this does not mean you won’t have some job to do. You need to be somewhat committed to keeping your pet healthy and happy. Indeed, a well taken care of clownfish can live for decades.

This guide is meant to offer you in-depth information about how to take care of your little saltwater friend. With proper understanding, you will find it fascinating to have clownish. Anyway, let’s get started.

What is Clownfish

Ocellaris clownfish, or simply clownfish, are strikingly beautiful small tropical fish. It is prominent for its affinity for hiding in anemones.

They are endemic to the Indian Ocean and the Pacific Ocean, but not found in the Atlantic. Clownfish prefer warmer water, and due to their bonding with anemones, they are known as anemonefish.

Additionally, they are synonymous with their unique way of swimming. If you keep a dog too, you know how a happy dog waddles when coming to greet you. Clownfish is just another species of its own kind; it waddles in saltwater.

Clownfish Diet

When I say clownfish is an omnivore, you understand what it means with its diet. Anyway, this would not be a reasonable assumption when telling a beginning saltwater aquarist.

Clownfish feed on small zooplankton like copepods and tunicate larvae in the wild. They also consume algae and tentacles found on the anemones.

Generally, any pellet food or high-quality flake will be perfectly okay for keeping your clownfish healthy and happier. However, a varied diet will be excellent. Therefore, you can consider adding live foods and frozen foods into their diet to revitalize them and possibly extend their lifespan.

Feeding clownish at least once in a day can be ideal; however, they won’t be harmed by more than one meal a day. Even though feeding your pet once a day may suppress maintenance costs, their growth rate may retard.

During breeding, if planned, your clownfish requires a minimum of 3 meals of varied diets. To ensure floating foods do not adversely affect aquarium water quality, consider including cleaners like snails and crabs.

Size and lifespan

Typically, Ocellaris clownfish are small in size. Under normal water conditions and a healthy diet, this species will grow up to 3 – 4.3 inches (11 cm). However, aquarium species may not grow too large sizes. But in the ocean, they can grow to reach a length of 6.5 inches.

In the beginning, you must have read that these saltwater species can live for decades. It is worth noting that your clownfish lifespan is slightly dependent on host anemone, keeping the other factors constant. Therefore, you must be very selective when it comes to the anemone. Typically, clownfish will live for 6-10 years in the wild, but the lifespan is halved in captivity, which means less than five years.

How to take care of Clownfish

Somewhat serious commitment is required to keep your pet happy. You need each other, and with proper care, your clownfish will stay healthy and happy. Caring encompasses a lot, including meals and water conditions. But here, the main concern is the aquarium conditions.

The recommended tank size to keep your clownfish healthy and happy is 20 to 30 gallons. However, you will find sources suggesting 8-10 gallons, which is still okay. But if you stick to the latter, you will have much to do when it comes to maintenance. You need quality filtration and regular changing of water.

However, immaculately maintaining the water condition is always crucial. Try to establish a natural cleaning cycle in the aquarium. You can do it, keeping some bottom-dweller tankmates with clownfish and adding live plants. Though it is perfectly okay if you want to have a fish-only aquarium. Maintain proper water circulation, and pick a suitable aquarium filter

After setting up your tanks, you need to add enough marine salt to attain specific gravity of 1.020 to 1.026 and stable (29-35 ppt). This is the clownfish required salinity. Since clownfish is a tropical region fish, your aquarium water temperatures should range from 75°F to 80°F (24°C – 27°C).

Clownfish will survive in water whose pH value is 8.0 to 8.4. To keep your pets happier, you need to keep other water conditions with an acceptable saltwater aquarium range. For instance, ammonia – 0.0, which is too low to detect, and nitrites should be less than 0.2 parts per million (ppm).

It is not a must you include the anemones. If you choose to keep host anemones, you must have proper aquarium lighting. Fish-only aquariums do not need intense lights. If you decide to keep anemones in the aquarium, the tank has to be larger than 50 gallons. 

Disease and treatment

Hole in the Head (HITH):

Address water quality issues, feed the fish in vitamin-rich diets, and rinse or avoid using activated carbon for some time.

Marine Ich (Cryptacaryon): 

This one is a common disease of saltwater fish. Buy the right medication from your local pet store or online stores.

Marine Ich (Cryptacaryon): 

Ensuring your aquarium has completed the nitrogen cycle is the perfect solution. Also, don’t overcrowd your aquarium, change waters frequently, and consider replacing filters.

Nitrite Poisoning: 

Nitrate is the byproduct of the nitrogen cycle and produces from ammonia. Though much less toxic than ammonia, nitrate can be harmful if the level becomes too high. Change water levels and monitor the levels until you resolve the problem.

Oxygen starvation:

Overstocking might be the leading cause of oxygen efficiency in the water. Avoid overstocking. Increase aeration in the aquarium or lower the water temperatures.


Generally, clownfish aquariums are easy to set up and maintain, and the fish is easy to keep. If you keep them in a community aquarium, avoid large carnivorous aggressive fish and keep one clownfish per tank.

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Sujit Modak Aquarium Tales Owner
Sujit Modak

Hello, everyone! Welcome to my aquarium blog. Fishkeeping is my passion, and I started this fascinating hobby back in 2006. Besides my engineering profession, I deeply studied many fishkeeping topics since I started building my home aquarium. I researched effective aquarium filtration and lighting of planted aquariums. I am keeping 20+ species of freshwater and saltwater fish as my aquatic pet collection. I successfully experimented with a complex ecosystem inside the aquarium, biotope aquariums, aquaponics, etc. I would love to share some learnings from my hands-on experience of the last 14 years. Hopefully, my sharing will be somewhat helpful to make your aquarium journey awesome! 

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