Bandit Corydoras (Corydoras melini) — 3,5-4cm

Overview

The Corydoras melini, widely known as the Bandit Corydoras or False Bandit Catfish, is a peaceful, social bottom-dweller for sale UK native to the upper Rio Negro and Meta River basins in Brazil and Colombia. This striking species grows to around 4.8 cm in captivity and displays a distinctive black mask across the eyes, earning it the "bandit" nickname. Its easy care requirements and active personality make it a perfect addition to planted community aquariums. At Tropical Fish Co, we supply healthy juveniles that adapt quickly to aquarium life and reward attentive care with years of engaging, social behavior.

Appearance and Coloration

Corydoras melini displays a pale cream or silver base color with a bold black mask or band running horizontally through the eyes and across the head, creating a "bandit" appearance. The body is compact and armored, with a rounded snout and sensitive barbels. The dorsal and caudal fins are semi-translucent with faint dark spotting. Under subdued lighting, the contrast between the pale body and the dark mask is particularly striking. Juveniles at 2–3 cm show the same bold patterning as adults, and the coloration remains consistent throughout their lifespan.

Natural Habitat and Distribution

This species inhabits slow-moving tributaries, flooded forest zones, and leaf-litter-rich streams of the upper Rio Negro and Meta River basins. Water conditions are typically warm (22–26 °C), soft, acidic, and heavily tannin-stained. The substrate is fine sand or mud, and the environment is dimly lit with minimal current. Corydoras melini is a diurnal species, actively foraging during daylight hours in small groups. During the rainy season, these catfish move into shallow flooded areas to feed and spawn. Replicating these blackwater conditions at home encourages natural behavior and optimal health.

Aquarium Setup and Décor

A 60-litre aquarium is suitable for a group of five to seven Corydoras melini. Use soft sand or very smooth fine gravel to protect delicate barbels, which are essential for foraging. Décor should include driftwood, rounded stones, and live plants such as Java fern, Anubias, and Amazon swords. Floating plants help diffuse lighting and create shaded zones. Avoid sharp-edged decorations or coarse substrates, which can damage the barbels and lead to infection. A secure lid is recommended, as Corydoras occasionally dart to the surface for gulps of air.

Feeding and Nutrition

Corydoras melini is an omnivore that thrives on a varied sinking diet. Offer sinking carnivore/omnivore foods such as quality cory pellets, wafers, frozen or live bloodworms, daphnia, brine shrimp, and other small meaty foods. Also accepts some plant-based matter in a varied diet, such as blanched courgette or spinach. Feed once or twice daily in small portions, ensuring food reaches the substrate before mid-water fish consume it. Sinking foods prevent competition and allow the catfish to forage naturally along the bottom.

Behaviour and Social Structure

These catfish are highly social and must be kept in a proper group of at least five individuals to display confident, natural behavior. In smaller numbers they become shy and stressed, spending most of their time hidden. A well-adjusted shoal will actively forage across the substrate throughout the day, sifting sand through their gills and occasionally resting on plant leaves or driftwood. They are peaceful and compatible with a wide range of community fish. Males may engage in mild chasing during feeding, but aggression is extremely rare.

Compatible Tank Mates

Ideal companions include small peaceful tetras (neon, cardinal, rummy-nose), rasboras (harlequin, chili), livebearers (guppies, platies), small peaceful loaches (Kuhli, dwarf chain), and other peaceful Corydoras species. Avoid housing with large aggressive cichlids, fin-nipping fish, large predatory fish, very boisterous bottom-dwellers, or aggressive catfish. Small shrimp can coexist if the tank is well planted and offers hiding spaces.

Breeding in the Aquarium

Can be bred in captivity with soft, clean water, a cool water change to trigger spawning, and a group with more females than males. Males are slightly smaller and more streamlined than the plumper females. Eggs are typically laid on glass, plants, or décor and should be removed to a separate rearing tank to prevent predation by adults. Spawning often occurs after a series of partial water changes with cooler water. Fry require infusoria or liquid fry food initially, graduating to micro-worms and finely crushed flake within a week. Breeding success is achievable with patience and careful attention to water conditions.

Why Buy from Tropical Fish Co

At Tropical Fish Co, every Bandit Corydoras is quarantined, health-checked, and acclimated to UK water conditions before dispatch. We source our fish from reputable suppliers who prioritize ethical collection and sustainable practices. Our livestock arrives in insulated packaging with heat packs during colder months, ensuring safe transit. With decades of combined fishkeeping experience, our team is available to answer questions about care, compatibility, and tank setup. Whether you're building a planted biotope or expanding an established community aquarium, we're here to support your success. Order with confidence and enjoy premium freshwater fish delivered to your door.