Species description

Care, breeding and tankmates

Fish profile

Temperament

Semi-aggressive

They exhibit a peaceful, shy, and somewhat reclusive temperament, preferring to stay hidden away from bright light. Males can be mildly territorial with one another when competing for the most desirable spawning caves. Providing multiple suitably sized caves for each individual fish is the easiest way to prevent any aggression.

Diet

Omnivore

Unlike common plecos, this species is a carnivore and requires a diet rich in meaty proteins. They eagerly consume sinking carnivore wafers, frozen bloodworms, brine shrimp, and finely chopped seafood. They will rarely touch algae or vegetable matter, so these should not be relied upon as a primary food source.

Sex ratio

Harem

Adult males are easily identified by the presence of significantly longer odontodes on their cheeks and pectoral fins. Males also possess a broader, blockier head shape, whereas females maintain a rounder, plumper abdominal profile. A breeding group is typically most successful when consisting of one male and several females.

Feeding frequency

Twice daily

Feed them once a day, optimally introducing food just as the aquarium lights are turned off. Because they are naturally nocturnal and quite shy, they feel most comfortable foraging in the dark. Dropping the food directly near their preferred hiding spots helps them secure a meal before faster fish.

Bioload

The Monte Dourado Pleco generates a moderate bioload that is easily managed in well-maintained aquariums. Their carnivorous diet produces slightly more potent waste than algae-eaters, necessitating robust biological filtration. Regular weekly water changes are critical to prevent nitrate build-up and keep the fish healthy and colorful.

Flow

Stagnant

Originating from the Rio Jari basin, they thrive in highly oxygenated water with moderate to strong flow. Utilizing powerheads or appropriately positioned filter outflows will simulate their natural riverine environment. Maintaining high dissolved oxygen levels is absolutely essential, especially if kept at higher temperatures.

Reproduction

Oviparous

They are secretive cave spawners that will readily breed if provided with excellent water quality and a high-protein diet. The male claims a narrow cave, courts a female, and takes full responsibility for guarding the fertilized eggs. The male will continuously fan the eggs and fiercely protect the fry until they are free-swimming.

Compatibility & tankmates

They are highly peaceful fish that are perfectly suited for calm, Amazonian community aquariums. They do extremely well with peaceful mid-water species like rasboras, tetras, and small, non-aggressive cichlids. They should not be kept with highly aggressive bottom dwellers that will bully them for territory.

Tank level

Bottom

They are strict bottom dwellers that require an environment heavily structured with hardscape. The aquarium must include an abundance of ceramic caves, stacked slate crevices, and driftwood tangles. They will spend almost the entire day securely hidden, coming out to actively forage only at night.