Redtail Catfish

The redtail catfish is a large, colorful fish that is native to the Amazon and Orinoco river basins of South America. It only lives in freshwater streams and rivers. Distinctive for its bright red fins and enormous size, this attractive fish is a popular exhibit in aquariums.

4 Amazing Facts About the Redtail Catfish

• It uses its long, sensitive whiskers to smell.
• It can grow up to 6 feet long.
• Unlike other catfish, it is an active and aggressive predator.
• It is one of the three giant catfish species native to the Amazon.

Redtail Catfish Classification and Scientific Name

The fish’s scientific name is Phractocephalus hemioliopterus. In Venezuela, it is known as the cajaro. In Brazil, it is called the pirarara. It is the only extant species of the genus Phractocephalus.

The Redtail Catfish is one of the three giant species of catfish in the Amazon. The other two are the piraiba and the jau.

Redtail Catfish Appearance

This fish is a pimelodid or long-whiskered catfish. It is a large fish that can grow almost 6 feet long and have a top weight of 180 pounds. Most redtail catfish, however, do not get this big. They are usually 3 to 4 feet long.

Unusual for a catfish, the redtail is very colorful. It has a brown-spotted back and yellow sides. The fish often has dark gray scales with a bold, darker pattern on each side. Its most distinctive features are its bright red dorsal fin and the red caudal fin that gives this fish its name. It usually has a black body and a white belly. It has a wide, flat head with long whiskers.

Its fighting spirit and bright, unusual colors make it one of the most exotic-looking river fish.

Distribution, Population, and Habitat

The redtail catfish is native to the Amazon, Orinoco, and Essequibo River basins of South America. It lives in freshwater streams in Ecuador, Brazil, Colombia, Peru, and Venezuela.

Redtail catfish are considered the most attractive catfish, and they are popular in aquarium exhibits. Some places where you can see them are:

• Tennessee Aquarium
• Branson’s Wild Word
• Dallas World Aquarium

There is also an Asian redtail catfish (Hemibagrus wyckioides), a different species native to Thailand and other parts of Southeast Asia.

Redtail Catfish Predators and Prey

The redtail catfish’s chief predators are humans, who regularly hunt it as a game fish. It is a large, aggressive fish that usually dominates its environment.

Unlike other catfish species, the redtail does not cling to the bottom and wait for prey to approach. It is an active, energetic predator that is known to have a voracious appetite. Red-tailed catfish are territorial fish that defend their hunting grounds aggressively. They are good fighters who will attack other fish trying to move in on their chosen area.

During the day, it is almost motionless. At night, it goes in search of prey.

What Does the Redtail Catfish eat?

The fish’s diet includes:

• Worms
• Shrimps
• Crabs
• Insects
• Fruit
• Water plants

Reproduction and Lifespan

The mating season for most redtail catfish is between May and July. This fish has an unusual mating routine. After bumping into a male, a female catfish opens her mouth to receive the male’s sperm. She then lays the eggs, which she holds in her ventral fins. She deposits the sperm on the eggs and then places the eggs in a hidden nest. The baby catfish hatch about five days later. A baby catfish is called a fry.

Redtail catfish have a long lifespan. They can live 15 years in captivity, but they live even longer in the wild. Captivity is stressful if they are in a tank that’s too small for them.

Redtail Catfish in Fishing and Cooking

Redtail catfish are a very popular game fish. Many people visit the Amazon region intending to catch these and other large, exotic river fish. They are considered excellent game fish because they put up a fierce battle. Their size and beautiful colors also make them fun for experienced anglers to catch.

These massive fish provide plenty of meat. Natives of the Amazon region, however, don’t eat them because their meat is dark. To develop redtails as a food source, some fisheries have bred them with other species like the Tiger Shovelnose. This pairing produces a hybrid called the Tiger Redtail Catfish that has light-colored meat.

There are many ways to cook catfish. Its low price and good flavor have made it a staple of many cuisines. One of the most popular ways is to flour it, season it, and deep-fry it. It is also a good fish to grill or bake. Catfish meat is dense, tender, and sweet.

Population

The redtail catfish (Phractocephalus hemioliopterus) is listed as Least Concern on the IUCN Red List as of 2025. Population numbers are unknown, but the population appears stable.

Colorful River Giant

This catfish is a striking fish with a fighting spirit. It is good to eat and beautiful to look at. If you get a chance to see one in an aquarium, don’t miss the opportunity to see this giant of the Amazon.