Hypancistrus L199 Care Guide - Aquarium Setup, Diet & Breeding

Hypancistrus L199 is a boldly patterned suckermouth catfish with a dark body marked by contrasting pale spots and broken bands. Its flattened profile, broad head and armour-like plates give it the characteristic appearance of a riverine loricariid, while the enlarged pectoral and dorsal fins help it hold position in strong current.

This pleco is generally peaceful, secretive and most active from dusk onwards. It spends much of its time resting on rockwork or exploring caves, but established adults may become territorial toward other plecos, particularly when competing for shelters or breeding sites.

In the wild, L199 inhabits clear, highly oxygenated waterways with rocky bottoms, abundant current and relatively little fine sediment. Its specialised mouth allows it to cling to hard surfaces while grazing and searching for small food items among stones and crevices.

The species is part of the diverse Hypancistrus group from the Xingu region, an area famous for its colourful and highly specialised loricariid catfish. Its attractive pattern and manageable adult size have made it a sought-after fish among pleco keepers, although responsible sourcing is especially important for species from this ecologically sensitive region.

Hypancistrus furunculus, sold in the aquarium trade as L199, originates from the Rio Xingu basin in Pará, Brazil, in South America. It is associated with clear, fast-flowing sections of the river and its rocky tributaries.

A single Hypancistrus L199 should have an aquarium of at least 120 litres, with a footprint of approximately 120 × 40 cm; a larger tank is preferable for a group or a community containing several bottom-dwelling fish. Use strong filtration, vigorous surface movement and excellent oxygenation to replicate its flowing-river habitat. Provide rounded stones, smooth wood, robust plants and several tight-fitting caves or ceramic shelters. Sand or fine, smooth gravel is suitable, while sharp substrate and unstable rockwork should be avoided.

Adults reach approximately 12 cm (4.7 in) in standard length. Males are often slightly larger and more heavily built than females, although individual size varies.

This species is an omnivorous bottom feeder that benefits from a varied diet rather than algae alone. Offer quality sinking carnivore or omnivore pellets, algae-based wafers, blanched vegetables such as courgette and spinach, and occasional meaty foods including frozen bloodworm, brine shrimp or mussel. Young fish and breeding adults should receive regular nutritious meals, while uneaten food should be removed promptly.

Hypancistrus L199 is suitable for a peaceful community aquarium with similarly sized tetras, pencilfish, peaceful rasboras, peaceful barbs, Corydoras and other calm South American species. It can also live with many small to medium peaceful cichlids, provided there is plenty of shelter and no competition for caves. Avoid aggressive or highly boisterous fish, fin-nippers and other territorial bottom dwellers. Keeping multiple Hypancistrus together requires extra caves and floor space, as males may defend breeding shelters.

Hypancistrus L199 can be bred in a mature aquarium containing several suitable caves and excellent water quality. Spawning usually takes place inside a snug cave, where the male guards the eggs and later protects the fry. Offer a varied, protein-rich diet, maintain strong oxygenation and carry out regular, clean water changes. Once the eggs hatch, the fry can be fed finely crushed foods and small sinking foods as their yolk sacs are absorbed.

Mature males usually have a broader head and develop more pronounced bristles or odontodes along the cheeks, pectoral-fin rays and sides of the body. Females tend to have a rounder abdomen, a narrower head and fewer visible odontodes.