Pygmy Corydoras Care Guide - Aquarium Tips, Diet & Breeding

Pygmy Corydoras are among the smallest members of the Corydoras family, with a compact, armour-plated body and a dark horizontal stripe running from the snout towards the tail. Their silvery body is finely marked, and the transparent fins give them a delicate appearance under aquarium lighting.

Unlike many larger Corydoras, this species spends a noticeable amount of time swimming in the middle levels of the aquarium as well as foraging across the substrate. They are active, peaceful and surprisingly confident when kept in a proper group, often hovering together before settling among plants or resting on broad leaves.

In the wild, Pygmy Corydoras inhabit gentle-flowing tributaries, flooded forest margins and quiet pools. Their natural surroundings are often shaded, with subdued light, leaf litter, fine sediment and dense aquatic or overhanging vegetation.

These fish use sensitive barbels around the mouth to investigate the bottom and locate small food items. Their diminutive size and engaging group behaviour have made them a popular choice for planted nano and community aquariums, although they should not be treated as a substitute for routine aquarium care simply because they are small.

Pygmy Corydoras originate from northern South America, particularly tributaries and slower waters of the upper Madeira River basin in Brazil and Bolivia. They inhabit shallow forest streams and quiet backwaters with sandy or fine, soft sediments, leaf litter and submerged vegetation.

A group of Pygmy Corydoras should have at least 40 litres, with a footprint of about 60 by 30 cm providing more useful floor space than a tall, narrow aquarium. Use smooth fine sand or rounded gravel to protect their sensitive barbels, together with dense plants, shaded areas, driftwood and leaf litter for cover. Gentle filtration, well-oxygenated water and open areas for group swimming are ideal, while strong currents and sharp decor should be avoided. A temperature of 22–26°C and a pH around 6.0–7.5 suit this species.

Males typically reach about 2.5 cm (1 inch), while females are larger and can grow to around 3 cm (1.2 inches).

Offer a varied diet of appropriately sized sinking micro-pellets, crushed catfish tablets and small granules, supplemented with frozen or live foods such as baby brine shrimp, daphnia, cyclops and bloodworm. They are omnivores and should not be expected to survive on leftover food or algae alone. Feed small portions that reach the substrate and ensure every fish gets access to food.

Pygmy Corydoras are peaceful community fish and can be kept with other small, gentle species such as ember tetras, chili rasboras, small peaceful danios, otocinclus and other compatible Corydoras. They also mix well with freshwater shrimp and snails, although shrimp fry may be eaten opportunistically. Avoid large cichlids, predatory fish, fin-nippers and boisterous species that may outcompete or intimidate them.

Pygmy Corydoras are egg-scattering fish that can breed in a mature, well-conditioned aquarium. Feed a varied diet of small live or frozen foods, then encourage spawning with cooler, soft-water changes. The female carries a few adhesive eggs between her pelvic fins before placing them on plant leaves, glass or other surfaces, while the male fertilises them. Adults may eat the eggs, so breeders commonly remove the eggs or provide a separate spawning setup. Eggs usually hatch in around three to five days, and the tiny fry need suitably fine foods such as powdered fry food or freshly hatched baby brine shrimp.

Females are usually broader through the body and noticeably larger than males, particularly when viewed from above. Males are slimmer and slightly shorter, but the difference can be subtle in young fish.