Hognosed brochis - Brochis multiradiatus

Scientific name: Brochis multiradiatus

Common name: Hognosed brochis

Family: Callichthyidae

Usual size in fish tanks: 7 - 8 cm (2.76 - 3.15 inch)

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Recommended pH range for the species: 6 - 7.5

Recommended water hardness (dGH): 2 - 16°N (35.71 - 285.71ppm)

0°C 32°F30°C 86°F

Recommended temperature: 21 - 26 °C (69.8 - 78.8°F)

The way how these fish reproduce: Spawning

Where the species comes from: South America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Bottom levels

Food and Feeding

Brochis multiradiatus will readily accept a variety of foods, making them easy to care for in community setups. Their diet should primarily consist of high-quality sinking pellets or algae wafers to ensure they receive food directly at the bottom, where they naturally feed. To mimic their wild foraging behavior and support optimal health, supplement their diet several times per week with live or frozen treats such as bloodworms, daphnia, or brine shrimp. Avoid overfeeding and remove uneaten food to maintain water quality.

Origin

Hognosed brochis originate from the freshwater river systems of South America, particularly in Peru and Ecuador. They inhabit slow-moving tributaries, oxbow lakes, and floodplain regions with sandy or muddy substrates. Their natural habitats are typically shallow and rich in leaf litter, submerged branches, and aquatic vegetation, offering ample foraging grounds and hiding spots.

Sexing

Sexual dimorphism in Brochis multiradiatus is subtle. Mature females tend to be broader and rounder than males, especially when viewed from above. Males may also appear slightly slimmer and more streamlined, but visual differences remain minimal compared to some other Callichthyidae species.

Breeding

Spawning can be encouraged in the aquarium by performing water changes with slightly cooler water, simulating the onset of the rainy season. While wild specimens often breed in groups, pairs will spawn successfully in captivity. Use soft, clean water with plenty of oxygenation and fine-leaved plants or smooth surfaces for egg deposition. The breeding behavior closely mirrors that of Corydoras species. After spawning, eggs should be removed or protected to prevent predation, and the fry can be fed with infusoria and then newly hatched brine shrimp.

Lifespan

With proper care, the average lifespan of Brochis multiradiatus is around 4 to 6 years. Providing high water quality, a balanced diet, and a peaceful environment contributes significantly to their longevity.

Short Description

Commonly referred to as the Hognosed brochis or Emerald catfish (not to be confused with Corydoras splendens), this species is prized for its striking iridescent green coloration and peaceful nature. Slightly larger and more robust than typical Corydoras, they grow up to 8 cm in length and require a tank with a soft, sandy substrate to protect their delicate barbels. Keep them in groups of 5 or more to promote natural behavior and reduce stress. While generally peaceful, their size and appetite may cause them to outcompete smaller bottom-dwelling fish for food, so tankmate selection should be considered carefully. Provide shaded areas, driftwood, and broad-leaved plants to create a comfortable and naturalistic environment.

Picture

Thanks to Ted. Other pictures were bought from jjphoto.dk.