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Species profile

Fuscomaculatus Plecostomus L233

Hypostomus fuscomaculatus

Common names: Fuscomaculatus Plecostomus L233, L233

Recognized speciesPlecostomus

Adult size

Up to 30 cm

Typical adult length 22.5–30 cm.

Up to 30 cm

Countries of origin

  • See all stock from Brazil

Good fit for your tank?

Good fit for

  • An experienced keeper with a large heavily filtered aquarium
  • A display centred on one substantial pleco
  • An aquarist prepared for heavy adult waste

Think carefully if

  • The tank is sized only for a juvenile
  • Several large plecos must share limited floor space
  • You expect routine cave breeding

Fuscomaculatus Plecostomus L233 is a South American loricariid represented by L233. It requires stable oxygen-rich water, suitable caves, and deliberate species-appropriate feeding.

Appearance and Identification

A robust brown Hypostomus marked with many dark spots or blotches over the body and fins. Its adult proportions become heavier and more imposing than those of a small imported juvenile.

Use the L-number identification L233 together with the current assignment Hypostomus fuscomaculatus. Do not merge it with visually similar forms without matching collection locality and diagnostic features.

Sex differences are not reliably visible. Mature males may show stronger odontodes and a broader head, while females become fuller, but venting is more dependable.

Tank Requirements

Suggested filter
About 1,200–1,500 litres an hour
Suggested heater
About 300–450 W for this tank
Minimum tank volume
300 litres
Minimum tank length
120 cm
Minimum group size
1
Recommended group size
1
Activity level
Moderate
Flow preference
Moderate
Planting preference
Lightly planted
Hiding places
Yes
Lid recommended
Yes
Jumping risk
Low

Provide a large aquarium with powerful filtration, strong oxygenation, open floor space and sturdy wood or rock cover. Plan for substantial waste and an adult capable of moving loose decor.

Behaviour and Tankmates

Usually calm toward free-swimming fish but increasingly territorial toward other large bottom dwellers. It may dominate food and shelter.

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.

Keep with robust peaceful fish and avoid crowded pleco communities. Delicate plants and lightly secured structures may be disturbed.

Check tankmates for this species

Water Parameters

Temperature
22–29 °C
pH
6–8
GH
2–20
KH
1–10
TDS
50–350
Stability importance
Important

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.

Feeding

Diet types
Aufwuchs Grazer, Herbivore, Omnivore, Scavenger
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 a broad omnivorous diet containing vegetable-rich sinking foods, biofilm and occasional invertebrate protein. Algae and leftovers are not a complete diet.

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
25.5 °C
Breeding pH
7
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.

Reliable home-aquarium breeding is not established. Large Hypostomus often use specialised nesting sites that are difficult to provide indoors.

Habitat and Origin

Geographic origin
Amazon Basin, Brazil, South America
Natural habitat
Fast-Flowing Stream, Freshwater River, Freshwater Stream, Rocky Shoreline
Aquarium contexts
Freshwater Aquarium, Large Freshwater Aquarium
Audience level
Intermediate

Classification

Profile type
Recognized species
Genus
Hypostomus
Family
Loricariidae
Species group
Fish, Plecostomus
Previous scientific names
Hypostomus sp. (L233), Historic L-number designation retained for identification.

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