Species profile
Hadrostomus Plecostomus L219
Baryancistrus hadrostomus
Common names: Hadrostomus Plecostomus L219, L219
Recognized speciesPlecostomus
Adult size
Up to 25 cm
Typical adult length 18.8–25 cm.
Up to 25 cm
Countries of origin
Good fit for your tank?
Good fit for
- An experienced Baryancistrus keeper
- A mature warm aquarium with strong oxygenation
- An aquarist able to provide protected feeding areas
Think carefully if
- The aquarium is newly established
- You cannot confirm that each fish is feeding
- Several adult plecos must share limited caves
Hadrostomus Plecostomus L219 is a South American loricariid represented by L219. It requires stable oxygen-rich water, suitable caves, and deliberate species-appropriate feeding.
Appearance and Identification
A robust Baryancistrus with a dark body and contrasting pale spotting across the head, body and fins. Its broad mouth and heavy build become more evident as it matures.
Use the L-number identification L219 together with the current assignment Baryancistrus hadrostomus. Do not merge it with visually similar forms without matching collection locality and diagnostic features.
Mature males usually develop a broader head and stronger cheek and pectoral odontodes. Females are fuller through the abdomen, but juveniles are difficult to sex.
Tank Requirements
- Suggested filter
- About 1,000–1,250 litres an hour
- Suggested heater
- About 250–375 W for this tank
- Minimum tank volume
- 250 litres
- Minimum tank length
- 120 cm
- Minimum group size
- 1
- Recommended group size
- 1
- Activity level
- Moderate
- Flow preference
- High
- Planting preference
- Lightly planted
- Hiding places
- Yes
- Lid recommended
- Yes
- Jumping risk
- Low
Provide warm, highly oxygenated water, strong filtration, broad grazing surfaces and several secure caves. Targeted feeding is essential for shy or recently imported fish.
Behaviour and Tankmates
Generally secretive but territorial around caves and feeding areas. Adult males may become forceful with other plecos.
Can be kept singly. A pair or group requires several appropriately sized caves and enough floor area for every adult to feed without being trapped.
Mature males commonly defend caves and favoured feeding areas from similarly shaped loricariids.
Calm midwater fish are suitable, while crowded bottom communities are not. Each specimen needs a separate shelter and feeding station.
Water Parameters
Maintain stable clean water with strong oxygenation. Warm water, protein-rich food, wood waste, and crowded hardscape can rapidly reduce oxygen and degrade water quality.
Parameter caveat
Acclimate slowly to temperature and conductivity changes. Keep ammonia and nitrite at zero, control nitrate, and inspect caves and rockwork for trapped waste.
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Manual aquarium siphon and gravel cleaner
A manual siphon for routine aquarium water changes and accessible waste removal. The seller lists a hose approximately 1.6 m long.
Control the flow and keep the intake clear of fish and delicate planting. Clean the areas appropriate for your substrate and layout rather than disturbing the entire planted bed.
Daraz NepalCheck availability on Daraz
Feeding
- Diet types
- Aufwuchs Grazer, Herbivore, Omnivore
- Feeding frequency
- Daily
- Preferred foods
- Natural aufwuchs and biofilmMaintain mature rocks and wood for continuous supplementary grazing.
- Complete herbivore or algae waferUse a high-quality sinking staple with fibre.
- Blanched leafy greens or courgetteOffer occasionally and remove leftovers.
- Frozen daphnia or insect larvaeUse small portions as supplementary protein.
Offer vegetable and algae-rich sinking foods, soft vegetables and biofilm with modest invertebrate protein. Do not rely on aquarium algae alone.
Feed after lights dim and distribute food near every occupied shelter. Confirm that subordinate fish eat and remove rich leftovers before they affect water quality.
Breeding
- Breeding type
- Cave Spawner, Egg Layer
- Breeding difficulty
- Difficult
- Breeding temperature
- 28.5 °C
- Breeding pH
- 6.5
- Brood or egg count
- Usually several dozen adhesive eggs, with clutch size depending on species and female size.
- Incubation
- 7 days
- Parental care
- Paternal care
- Baby foods
- Mature biofilmProvides continuous grazing after fry leave the cave.
- Fine powdered sinking foodFeed tiny portions close to shelter several times daily.
- Newly hatched brine shrimpUse as supplementary protein once fry can take moving prey.
Specific captive breeding information is limited. A male-guarded cave is expected, but repeatable methods and fry requirements are not well established.
Habitat and Origin
- Geographic origin
- Amazon Basin, Brazil, South America
- Natural habitat
- Fast-Flowing Stream, Freshwater River, Rocky Shoreline
- Aquarium contexts
- Freshwater Aquarium, High-Flow Aquarium, Large Freshwater Aquarium, Species-Only Aquarium
- Audience level
- Advanced
Classification
- Profile type
- Recognized species
- Genus
- Baryancistrus
- Family
- Loricariidae
- Species group
- Fish, Plecostomus
- Previous scientific names
- Baryancistrus sp. (L219), Historic L-number designation retained for identification.
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- Care level
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- Adult size
- 9–12 cm
- Minimum tank
- 90 litres
- Temperature
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- Care level
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- Adult size
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- Minimum tank
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- Temperature
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