Sterbai Cory

Also known as: Corydoras sterbai

Sterbai Cory (Corydoras sterbai) is a popular freshwater catfish known for its striking black and white spotted pattern and orange fins. The Sterbai Cory originates from Upper Rio Guaporé basin in Brazil and Bolivia, South America, reaches Adult size: 6-7 cm in captivity, typically lives 5-8 years, and is kept at 22-26°C (72-79°F). Individual fish vary, so treat this as a general guide rather than a guarantee.

Species at a glance

Origin: Upper Rio Guaporé basin in Brazil and Bolivia, South America
Adult size: Adult size: 6-7 cm (2.4-2.8 inches)
Life span: 5-8 years
Temperament: Peaceful, social, and active bottom-dweller
Tank size: Minimum 60 liters (16 gallons) for a group of 6
Water temp: 22-26°C (72-79°F)
pH range: 6.0-7.5
Diet: Omnivorous; accepts sinking pellets, wafers, frozen/live foods (bloodworms, brine shrimp), and blanched vegetables
Other names: Corydoras sterbai

About the Sterbai Cory

Sterbai Cory (Corydoras sterbai) is a popular freshwater catfish known for its striking black and white spotted pattern and orange fins. Native to slow-moving, sandy-bottomed streams in the Amazon basin, it thrives in well-oxygenated, soft to moderately hard water. This species is highly social and should be kept in groups of at least six to exhibit natural schooling behavior. Sterbai Corys are excellent community tank inhabitants due to their peaceful nature and algae-scavenging habits.

Lifespan and health

With proper care, Sterbai Corys typically live 5-8 years in captivity, though some individuals may reach up to 10 years under optimal conditions. Longevity is strongly influenced by water quality, diet consistency, and stress reduction; maintaining nitrate levels below 20 ppm and providing a varied diet significantly increases lifespan. Regular observation for signs of stress or illness is critical, as early intervention improves outcomes. Common health issues include barbel erosion from rough substrates or poor water quality, which can be prevented by using soft sand and maintaining clean conditions. Ich (white spot disease) may occur if temperatures drop below 22°C or during stressful introductions; treat with gradual temperature increase to 28°C and appropriate medication if needed. Bacterial infections, often signaled by lethargy, clamped fins, or ulcers, require quarantine and antibiotic treatment. Preventative care includes avoiding overstocking, performing regular water tests, and quarantining new fish for 2-4 weeks before introduction.

Overview

Care and tank setup

Tank setup requires a soft sand substrate to protect their delicate barbels, with plenty of hiding places using driftwood, caves, and dense planting (e.g., Java fern, Anubias). A minimum tank size of 60 liters (16 gallons) is recommended for a group of six, with additional 10 liters (2.5 gallons) per extra fish. Filtration should provide gentle to moderate flow, mimicking their natural habitat, and weekly 25% water changes are essential to maintain low nitrate levels (<20 ppm). Water parameters must be stable: temperature maintained between 22-26°C (72-79°F), pH 6.0-7.5, and hardness 2-15 dGH. Avoid sudden changes in water chemistry, as Sterbai Corys are sensitive to poor water quality. Use a heater and thermometer to ensure consistent temperature, and consider adding Indian almond leaves to slightly acidify and soften the water naturally. Feeding should occur once or twice daily with a varied diet: high-quality sinking catfish pellets as a staple, supplemented 2-3 times weekly with frozen or live foods like bloodworms or daphnia. Offer blanched zucchini or cucumber once a week for plant matter. Remove uneaten food within 2 hours to prevent water fouling. Tankmates should be peaceful and non-aggressive; ideal companions include small tetras, rasboras, guppies, and dwarf cichlids. Avoid large or fin-nipping species that may stress or injure the Corys.

Adding a Sterbai Cory? Research the species’ adult size and temperament carefully, quarantine new fish before introducing them to your tank, and buy from reputable aquarium stores or breeders.

Breed information on this page is based on the Wikipedia article on the Sterbai Cory, supplemented with additional research. Reviewed for accuracy.