Salt and pepper cory

Water parameters

Tolerated range for this species. Aim for the middle of each band rather than the extremes.

Tank and habitat

Substrate: sand.

Behavior

Plant interaction: plant safe.

Typically wild-caught; acclimate slowly.

Feeding

Tiny mouths need tiny food. Micro pellets, crushed flake, frozen baby brine shrimp, frozen cyclops, frozen daphnia, and live microworms. They feed both in the midwater column and on the substrate surface. In community tanks, they're easily outcompeted. Target-feed with a pipette or drop food in their corner. Two to three feedings daily in small amounts.

Compatibility

• The largest of the three dwarf corys, alongside C. pygmaeus and C. hastatus. Unlike the midwater-hovering pygmy and hastatus corys, the salt-and-pepper behaves like a typical bottom-dwelling cory, working the substrate and darting up only now and then for air.
• Safe with any fish that won't eat them. Nano fish, shrimp, snails, and otocinclus are ideal companions. Larger community fish that share the bottom zone may intimidate them.
• Groups of 8+ for natural schooling behavior. They hover in the midwater column in a loose group, occasionally darting to the substrate to forage. Smaller groups are timid and hide.
• Excellent shrimp tank inhabitants. Ignore adult shrimp and shrimplets; add activity without any predation risk.

Origin and habitat

Corydoras habrosus, the salt-and-pepper cory, now reclassified as Hoplisoma habrosum, is one of the three little dwarf corys in the hobby, alongside C. pygmaeus and C. hastatus. It comes from the upper Orinoco basin of eastern Colombia and western Venezuela, with most records from the Rio Apure system, in slow tributaries, lagoons, and seasonally flooded forest and grassland. The species name habrosus is Greek for graceful or delicate. It is the largest of the three dwarf corys, reaching around 3.5 cm at most though often nearer 2 cm, and unlike the midwater-hovering pygmy and hastatus corys it behaves like a typical bottom-dwelling cory, working the substrate and only darting up now and then to gulp air at the surface. The pale body is dusted with dark speckles and carries a broken dark stripe from snout to tail, which gives the salt-and-pepper look; it is told from the similar C. cochui by having two or three dark side markings rather than four or five. Like all corydoras it is an armoured catfish with bony plates rather than scales, and IUCN lists it as Near Threatened.

Breeding

Breeds along the usual corydoras lines and fairly readily for a dwarf species. A cool water change and soft, slightly acidic water set it off, and the female lays small orange eggs singly on leaves, glass, and decor, often just above the substrate. The eggs hatch in three to five days, and the fry are tiny and need infusoria or vinegar eels before baby brine shrimp. It spawns in small, frequent batches rather than big clutches, so in a planted tank a few fry can turn up on their own, though it is less prolific than the larger corys.

Common problems

It carries the usual dwarf-cory vulnerabilities: a small body with little buffer against water-quality swings, intolerance of high nitrate, and sensitivity to copper, so chemical treatments belong at reduced doses and steady, clean water matters more than with bigger fish. Ich can show up during acclimation, and wild-caught stock may carry internal parasites that cause wasting. A fine sand bottom protects the barbels it feeds with, and it needs to be kept in a real group, eight or more, to be confident and active. With only a few years of life, a colony has to breed to keep going.

Bioload

Further reading

• How to cycle a fish tank
• Stocking ideas by tank size