Catfish are among the most popular aquarium inhabitants, yet even these hardy fish can fall ill. Aquarium catfish diseases typically stem from two main sources: poor water conditions and external infections introduced through new fish, live food, plants, or snails. In my experience, early symptom recognition and proper treatment are crucial for maintaining fish health and preventing disease spread throughout the tank.
Pleco fish belong to the Loricariidae family, commonly known as armored or suckermouth catfish. These aquarium inhabitants have earned their popularity not only for their distinctive appearance but also for their practical benefits: they actively consume algae, helping maintain tank cleanliness.
The synodontis catfish stands out as one of the most fascinating African aquarium fish available to hobbyists today. Belonging to the family Mochokidae, the genus Synodontis includes over 130 species native to rivers and lakes across Central, Eastern, and Western Africa. These catfish captivate aquarists not only with their distinctive appearance but also with their remarkable ability to swim upside down—a behavior that helps them hunt insects from the water surface.
Mystus catfish belong to a genus of approximately 30 species of bottom-dwelling predators native to South and Southeast Asia. These fish inhabit rivers and lakes from Pakistan and India through to Vietnam. While wild specimens can reach 45 cm in length, aquarium-kept mystus catfish typically grow to 15–25 cm depending on the specific species.
The gold neon tetra is a selectively bred color variant of the popular neon tetra. Breeders developed this variety by isolating genes responsible for the golden metallic sheen on the scales. The defining feature is a shimmering stripe running along the body that reflects light with a distinctive gold hue.
The striped raphael catfish belongs to the thorny catfish family and stands out with its distinctive banded pattern and robust armor plating. The body is covered with thick skin reinforced by bony plates, while characteristic spines run along the lateral line. Bold black and white or yellowish stripes make this species easily recognizable among aquarium inhabitants.
The hoplo catfish (Hoplosternum thoracatum) stands out as one of the most fascinating bottom-dwelling species available to aquarium hobbyists. This member of the armored catfish family attracts attention not only through its distinctive appearance but also its engaging behavior. In the wild, this species inhabits waterways across South America—from Panama to Paraguay—populating the Amazon, Orinoco, and upper Paraguay river basins.
Cory catfish belong to the genus Corydoras from the armored catfish family. These popular aquarium fish have earned widespread appreciation for their peaceful temperament, hardy nature, and useful habit of scavenging food from the substrate. The genus includes approximately 200 described species, with new ones regularly discovered. Undescribed species receive temporary designations with C or L codes followed by numbers.
Corydoras pygmaeus, commonly known as the pygmy cory, is among the smallest members of the armored catfish family. First scientifically described by Knaack in 1966, this diminutive species quickly gained popularity among aquarists for its peaceful temperament and compact size. In my experience, the pygmy cory makes an excellent choice for nano aquariums and community tanks with other gentle species.