Aquarium Fish That Like To Be Alone

What Fish Can Live Alone? When we think of the best fish for aquariums, we usually think of a school of fish. Some fish, however, prefer to live alone, even in tanks. These fish are solitary, they prefer to be alone. Some of these are extremely aggressive and should be kept alone.

Before you begin planning the composition of your fish tank, you should be aware that these freshwater aquarium fish are best when left alone.

Here are some of the lists of fish that can be kept alone in small or large tanks.

26 Aquarium Fish That Like To Be Alone

26 Aquarium Fish That Like To Be Alone


This ferocious fish from the South American Amazon will not let anyone get close to it. “You can escape a crocodile, but not piranha-infested waters,” says a popular saying in the Amazon rain forests. These fish are so ferocious that they have been known to jump out of fish bowls and kill themselves. As a result, keep this wild pet in a securely covered aquarium.


Betta Fish Like To Be Alone

These are the best aquarium fish to keep to themselves. Because they are fighters, they cannot coexist with other types of fish. They do, however, do well when paired with other Betta fish. Betta fish show more colors when left alone. The best thing about them is how simple they are to maintain. For oxygen supply, you can keep a small filter or live plants. Even when fully grown, they eat little and remain small.

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Oscar Fish In It's Habitat

They appear to be large but playful fish. Never make the mistake of tying two things together. Forget about other types of fish; these fish aren’t even compatible with their own species. Oscars grow to be quite large, so they require a large, well-ventilated tank. Another intriguing aspect of Oscars is that, while they prefer to live alone, they are easily bored. They are very temperamental, and you must keep them entertained by placing some plastic toys in their tank.

Paradise Fish

Paradise Fish That Like To Be Alone

These were the first aquarium-raised exotic fish. Because of its aggressive nature, paradise fish is ideal for aquariums. They are fighters and will not tolerate most smaller fish. They do well in the presence of equal competitors, such as sharks. The Paradise fish, on the other hand, should be left alone because they are voracious eaters and squabble a lot.

Cichlids Fish

Cichlids Fish

Cichlids are fish that have a lot of personality and temperament. I can recommend these fish because you have a twenty gallon tank. These fish remain small and ready to reproduce. The fish tank that these fish are inhibiting will be a hive of activity. They make excellent parents and reproduce in shells. Begin with a few of these, and within a few weeks, they will begin to breed and buzz with babies. They require fine sand as a substrate because they dig a lot.

Kribensis Cichlids

Kribensis Cichlids Like To Be Alone

These vibrantly colored cichlids make excellent parents and are simple to keep in a twenty gallon tank. Give them a coconut shell and a small substrate. They will quickly settle in and make themselves at home in the aquarium.

Figure 8 Puffers

Figure 8 Puffers Like To Be Alone

Few people can resist seeing a pufferfish, and the small figure-8 puffer might be one you’d like to bring home to your own freshwater aquarium. Their expressive faces, inquisitive minds, and propeller-like fins are endearing. When startled, pufferfish inflate themselves with water or air, giving them their name. This is a very effective defensive mechanism because swallowing a fish that is ballooning in size is more difficult!

Spotted Green Puffers

Spotted Green Puffers Like To Be Alone

The green spotted puffer (GSP) has special needs and care requirements. Their spotted yellow-green backs make them an appealing choice for home aquariums, and their unique behaviors set them apart from most other fish you’ve ever owned.

Freshwater Jellyfish

Freshwater Jellyfish

Only one species of freshwater jellyfish (Craspedacusta sowerbyi) is found in North America, but it is found almost everywhere else. They have a white, bell-shaped body that is clear or translucent and is about the size of a dime or nickel. Unlike some marine jellyfish, freshwater jellyfish do not endanger swimmers.

Needlenose Gars

Needlenose Gars Fish Like To Be Alone

The needle-nose gar is found in Asia’s rivers, ponds, and slack waters. They are long, slender fish with a silvery coloration. When in pursuit of prey, their body shape allows them to produce very quick bursts of speed.


Gouramis Fish

Gouramis are a large family of fish that range in size from medium to large. Most can be kept in community aquariums, but some species do not get along with others, and others are too timid to be kept with any fish. This reference covers the fundamental characteristics of the most popular Gourami species, allowing you to determine which one is best for you. Each species’ links lead to a more detailed profile of that particular fish.

There also many other types of gouramis such as : dwarf gouramis, kissing gouramis, blue gouramis (and the like), pearl goruamis, honey gouramis.



Goldfish as we know them today are all descendants of the Prussian carp, which is native to eastern and southeastern Asia, and they don’t resemble their dull-colored forefathers.


Arowana Fish

The arowana is a beautiful, bony fish with large scales and long barbels that protrude from its chin. It has a large head with a strong jaw that can open wide in order to catch its prey.

Fire Eel

Fire Eel

A fire eel is a type of spiny eel, which is not a true eel but rather a type of freshwater fish. Mastacembelus erythrotaenia belongs to the family Mastacembelidae, class Actinopterygii.


Bichirs Fish

The bichir is a fantastic and unique freshwater fish that will give your tank a very prehistoric feel. In fact, they are one of our favorite freshwater fish. Period. There are also a few different types available, each with its own set of colors and patterns. You have many options!

Convict Cichlid

Convict Cichlid

The convict cichlid is one of the most common species of cichlid. Because of their distinct appearance and simple care requirements, they’re a popular choice among freshwater aquarists.


Firemouths Fish

Firemouths are beautiful Central American cichlids with grey, red, and blue colors that really stand out in a tank. Because of their temperament and size, they get along well with many American cichlids.



Pterophyllum scalare, or freshwater angelfish, is a cichlid native to South America. These fish can be found in various river systems throughout Colombia, Guyana, French Guiana, Peru, and Brazil, including the Rio Oyapock, the Rio Essequibo, and the Amazon itself. This species can grow to a total length of 6 inches and a height of 8 inches.


Severum Fish

The Severum Cichlid is a long-standing aquarium favorite that has been around since the 1800s. These South American cichlids can grow to be quite large. Nonetheless, they are placid and get along well with the majority of community aquarium fish.


Festivum cichilds

Festivum cichlids are peaceful freshwater fish that can be cared for by even inexperienced fishkeepers. These fish thrive in tanks with densely planted plants and sandy substrates. Festivum fish do not get along with other aggressive cichlids or tiny fish that can hunt them.

Red Devils

Red Devils Fish

The Red Devil Cichlid, Amphilophus labiatus (previously Cichlasoma labiatum), is a friendly and exciting addition to any large show tank. It is a large Central American cichlid that can grow up to 15″ (38 cm) in length and is known for being one of the most ferocious and aggressive cichlids.

Green terrors

Green terrors Fish

Green Terror Cichlids are tropical freshwater fish that require a variety of habitats, including plants and rock formations. A sandy substrate is preferred at the bottom of your tank. Green Terror Cichlids have been observed digging (this is fairly common cichlid behavior).


Guadalupe Bass Fish

On May 10, 1989, the Guadalupe Bass was designated as the state fish of Texas. The Guadalupe Blass is only found in Texas and is a member of the black bass family of fish. It lives in fast-flowing streams and small rivers in the state’s central region. “Though its small size prevents it from being highly sought as a sport fish, the sheer abundance of Guadalupe bass is living testament to the sparkling purity of our state’s freshwater tributaries,” according to the legislature.

Jaguar Cichlid

Jaguar Cichlid Fish

Jaguar Cichlids (also known as Managuense) are a well-known freshwater species among aquarists. However, many of them are scared of this tenacious fish!

So, that are some of the solitary aquarium fish that are like and happy being alone. But keep in mind before decide wich fish you wanna keep alone it really depends on your tank size.