The 15 Best Types Of Freshwater Aquarium Catfish

There are numerous varieties of aquarium catfish out there, and they are highly favored by aquarists.

There are many unique looks, varying benefits, and behaviors that these creatures can add to your tank. Hence their prevalence in tanks globally.

With so many different types of aquarium catfish to choose from .which ones are the best?

In this article we have compiled a list of our preferred catfish species. And we hope that we can help you find the best for you.

1. Cory Catfish

Cory Catfish Also named Corydoras, are a part of a genus that includes more than 165 different species. Even though they are commonly referred to as “Cory Catfish”, each type has unique characteristics in terms of temperament and appearance. These stunning fish are generally low-maintenance, and do not grow very large, which makes them an ideal choice fo both experienced and inexperienced aquarists.

These species can exhibit a wide range of appearances, but their size will only get to be between 1 and 4 inches long.

The shades of freshwater aquarium catfish ranges from shimmering iridescent white to dark black, with most catfish exhibiting shades of brown to make camouflaging much easier.

If you are interested in keeping smaller Cory Catfish species, a 10-gallon tank is essential, though, a 20 to 30-gallon tank is preferable. This is especially true if you plan on creating a multi-species community tank or keeping groups.

These catfish require a lush environment filled with decor and plants. They thrive in warmer waters with a temperature that range between 70 and 80 degrees Fahrenheit. The pH balance of the water should be between 6.0 and 8.0 depending on the species.

2. Striped Raphael Catfish

The Striped Raphael Catfish is a vibrant species that’s been known to entertain aquarists. Even if they stick to the bottom of the water column like other catfish, these creatures are naturally playful and enjoy exploring their environment.

Despite having a muted coloration, Striped Raphael Catfish are noticeable. Thanks to their stiking horizontal stripes, they can’t be missed in the tank. In combination with their rayed fins and they make for a beautiful fish.

It is very important to not let their docile nature deceive you! These fish cause a lot of damage with their sharp fins. They are known for getting entangled in nets. If they’re consumed by larger fish, they can get lodged in the predator’s throat!

A mature Striped Raphael Catfish can reach lengths up to 9.4 inches. But this usually only happens when they are kept in larger tanks. The average size is about 6 inches long.

In order for you to prevent stress and disease, it is recommended to keep these fish in a 50-gallon tank. Waters should always be between 75 and 80 degrees with a pH balance of roughly 6.5 to 7.5.

3. Otocinclus

The Otocinclus Catfish, also known as “otos” or “dwarf suckers,” is a popular fish in the aquarium community due to its small size. Reaching only 2 inches in length, they’re tiny creatures that are capable of keeping your tank in good shape. The larger Otocinclus family include a few different species.

These catfish spend nearly all of their day scavenging for food. Particularly algae and plant detritus. You can usually find them clinging to the side of the tank feasting on plant detritus or eating algae. Aside from doing that, they will be searching for food in the substrate.

Though they can be a bit timid, they are peaceful by nature and like to spend a lot of time hiding near decor and plants when not eating.

Due to their small size, a group of these catfish can thrive in a 10-gallon tank with warmer waters that have a relatively neutral pH balance.

4. Bristlenose Pleco

The Bristlenose Pleco is a catfish species that are very good at keeping algae levels under control. These fish have a healthy appetite for all types of aquarium algae and will spend most of their time cleaning rocks, driftwood and glass surfaces.

Fortunately, they have effective equipment for the job. Like most freshwater catfish, Bristlenose Plecos possess a downturned mouth makes a strong suction that’s ideal for clinging onto algae-covered surfaces.

The Bristlenose Pleco can be easily identified by having several prominent barbels that grow from its mouth and head .These barbelrs are more numerous and larger compared to other carfish species, which makes them a distinct feature of this fish.

Bristlenose Plecos can get about 3 to 5 inches long. Even though they are not the biggest aquarium catfish around, they are still in need of plenty of room to swim around. A 25-gallon tank is recommended.

The fish is much known for being hardy and their ability to adapt well to many environments. They thrive in waters that are between 60 and 80 degrees.

5. Bumblebee Catfish

Thanks to its 3 inches length, the Bumblebee Catfish is ideal for small to medium-sized tanks. They do best in 20-gallon tanks with plenty of space to roam. Despite having a small stature, these aren’t fish that mix into the background.

The fish is aptly named for its striking black and yellow stripes that run along its body, even though some bumblebee subdued tan and brown tones.

Generally, caring for Bumblebee catfish is an easy process, because they are hardy ad can adapt to most standard aquarium setups, where the water temperature range between 70 and 77 degrees Fahrenheit and the pH is neutral .these catfish prefer their environment to be rich with plants and décor , because they enjoy hiding amongst rocks ,driftwood ,and vegetation .

6. Clown Pleco

Helming from Colombia and Venezuela, the Clown Catfish is a small fish that rarely get larger than 4 inches. They possess that unique traditional catfish profile. This includes a downturned mouth, large head and expansive dorsal fin.

The coloration distinguish the Clown Catfish from the rest. The base of the fish is dark black. With several thin stripes of orange or yellow cover the entire body. The colors are definitely eye-popping and can be a great indicator of the overall health of the fish.

7. Asian Stone Catfish

Asian Stone Catfish are one of the smallest aquarium catfish species you can ever find. Their length can’t surpass 1.3 inches. Therefore, you only need is a small 10-gallon tank to keep them in a good healthy conditions. To make things even easier, these catfish are very inactive and mellow.

Hailing from Bangladesh and India, these catfish can be found in slow-moving streams. They have a preference of temperatures between 75 and 64 degrees. The pH balance of the habitat should be range between 5.6 and 7.6.

While they might be mellow and relaxed, the Asian Stone Catfish possess some differentiating looks. They are very unique fish with long barbels, large fins, and some unique coloration.

8. Glass Catfish

Glass Catfish are appropriately labeled for having a transparent appearance. This catfish possess a body that’s almost completely clear like Glass Shrimp. You can individual organs and bones, making them an interesting fish to study.

When they grow to their fullest, Glass Catfish can reach 4 to 6 inches length. Witch requires a larger tank to keep them happy. They need at least a 30-gallon tank. However, bigger is always better for this fish.

These are schooling catfish that thrive in groups of at least five. When they are kept in larger groups, they will feel more safe and confident. And therefore, they’ll spend more time out of hiding!

Another interesting fact about Glass Catfish is that unlike other catfish species they’re not bottom dwellers. They have no problem swimming throughout the middle of the water column.

9. Pictus Catfish

Pictus Catfish look iconic, they can get to be about 5 inches long and feature long barbels growing out of their face. With one pair being able to match their overall length.

When it comes to the coloration, Pictus Catfish wears a more monochromatic appearance. They’re not tan or brown like other species. Instead, their base color is light gray. This is accompanied by spots of dark gray or black.

In order for you to keep Pictus Catfish healthy, you need a good source of protein. While they will consume plant detritus and algae, live food and pellets are a must. It’s important to note that due to their preference for protein, they may target smaller fish species as food, so tankmates should be chosen carefully.

10. Upside Down Catfish

The Upside down Catfish is a fascinating species to watch! As their name implies, they spend the vast majority of their time swimming upside down, which is a distinctive evolutionary characteristic that allows them to consume algae located on the undersides of rocks and plant leaves.

You can rest assured that this behavior is nothing to worry about. Although upside-down swimming is typically a cause for alarm in other species, it is entirely natural for these catfish that are kept in aquariums. Interestingly, there are no biological variances that can account for this peculiar swimming behavior. It seems to be just a personal preference of theirs!

These fish grow to a size of approximately 3 to 4 inches and are usually adorned with patches of brown and tan. A unique feature of this species is that their bellies are also dark, which is an uncommon characteristic among fish. It is speculated that this dark pigmentation helps them to blend in more effectively when swimming upside down.

11. Chinese Algae Eater

The Chinese Algae Eater has gained a somewhat infamous reputation due to their tendency towards aggressive behavior. However, this behavior is often a result of stress and overcrowding in their environment.

These catfish can grow up to 11 inches in length and can comfortably live in a 30-gallon tank. However, if you plan to keep them with other fish, a larger tank is recommended.

Chinese Algae Eaters can exhibit territorial behavior and are capable of defending themselves against other fish invading their space. For this reason, many owners choose to house them with semi-aggressive fish.

12. Twig Catfish

The Twig Catfish is aptly named for their remarkable ability to blend in with their surroundings. Resembling sunken tree branches, their bodies are slender and elongated, with flattened snouts. Their brown coloration, along with dark stripes or blotches, makes them easy to mistake for actual twigs. Their small fins also contribute to their twig-like appearance.

When fully grown, these catfish can reach a length of around 6 inches, but this requires a well-maintained environment. Twig Catfish can be challenging to care for, so proper attention is necessary to ensure their health and growth.

13. Gold Nugget Pleco

Undoubtedly, you must have come across the Gold Nugget Pleco, which has gained immense popularity in the aquarium trade due to its stunning appearance.

Their primary color is black, but their body is adorned with bright yellow spots, accompanied by thick stripes on the dorsal and caudal fins. They can grow up to a length of 9 inches.

Although generally peaceful, these catfish can exhibit territorial behavior in confined spaces. To prevent aggression, it is advisable to keep them in a tank that can hold at least 50 gallons.

Gold Nugget Plecos prefer to live solitary lives and do not appreciate the presence of other catfish, which can lead to stress and potentially aggressive behavior.

14. Tiger Shovelnose Catfish

The Tiger Shovelnose Catfish, native to South America, is a challenging species that is recommended only for experienced aquarists. Novices or casual hobbyists may find it difficult to take care of them properly, given their lifespan of 18 to 25 years.

One of the most significant challenges of owning them is finding adequate living space. In captivity, they can grow up to 2.5 to 3 feet in length and require more than 250 gallons of space to thrive, as they are highly active.

In terms of appearance, these catfish are stunning with their light brown coloration and distinct puzzle-like pattern of black stripes. They have large heads and elongated flat snouts, resembling shovels.

15. Redtail Catfish

The Redtail Catfish is a species that requires a high level of expertise to care for. These fish are very demanding and can be quite challenging to maintain if you’re not adequately prepared.

At full size, Redtail Catfish can grow up to 4 feet in length and are very active. Therefore, a minimum tank size of 1,000 gallons is required, but most experts recommend a larger tank of up to 2,000 gallons. Insufficient space can cause stress and illness in these fish.

When it comes to water parameters, these catfish are not too picky. They thrive in temperatures between 68 and 80 degrees Fahrenheit and a pH balance below 7.0 is recommended.

Despite the challenges of keeping these fish, it can be very rewarding for experienced aquarists. They have beautiful patterns reminiscent of Koi and are adorned with large sections of black and white. Of course, the iconic red tail is not to be missed.

Which Ones Are You Interested In?

Now that you have some knowledge about each of the best types of aquarium catfish, it’s time for you to decide which ones interest you the most!

There are many great options out there, therefore it can get quite challenging tricky for you to decide. Excepting the last two on our list (only experienced aquarists can keep them with plenty of resources), there’s nothing to be anxious about.

As long as you are aware of the care requirements for each species and consider them carefully, we think you’ll be happy keeping a freshwater catfish in your home tank.