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Species profile

L333 Hypancistrus Plecostomus

Hypancistrus sp. (L333)

Common names: L333 Hypancistrus Plecostomus, L333, Hypancistrus Plecostomus

Undescribed speciesPlecostomus
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Countries of origin

  • See all stock from Brazil

Good fit for your tank?

Good fit for

  • A keeper wanting a proven ornamental cave-spawning pleco
  • A warm aquarium with several narrow caves
  • A breeder able to maintain accurate line records

Think carefully if

  • You expect pattern alone to prove L333 identity
  • Fast bottom feeders will monopolise food
  • Similar Hypancistrus will be mixed without breeding control

L333 Hypancistrus Plecostomus is a South American loricariid currently filed as Hypancistrus sp. (L333). A dependable species-specific maximum adult size is not available, so the aquarium recommendation is deliberately conservative. It requires stable, oxygen-rich water, suitable caves, and deliberate feeding.

Appearance and Identification

L333 has a dark brown to black body covered by cream, yellow or white winding bands. Pattern width and continuity vary greatly between individuals, so appearance alone is not a secure way to verify the line.

This profile is identified by L333 and the current assignment Hypancistrus sp. (L333). Do not merge it with a visually similar L-number without matching collection locality and diagnostic features. The L-number remains the primary stable identifier because the form has not been formally described.

Mature males develop broader heads and stronger odontodes on the cheeks, first pectoral rays and rear body. Females become fuller through the abdomen, while young fish are difficult to sex confidently.

Tank Requirements

Suggested filter
About 360–450 litres an hour
Suggested heater
About 100–125 W for this tank
Minimum tank volume
90 litres
Minimum tank length
75 cm
Minimum group size
1
Recommended group size
3
Activity level
Moderate
Flow preference
High
Planting preference
Lightly planted
Hiding places
Yes
Lid recommended
Yes
Jumping risk
Low

Provide warm, clean and highly oxygenated water with strong filtration, shaded rockwork and several close-fitting caves. Leave clear territories for mature males and keep line records if breeding.

Behaviour and Tankmates

Mostly nocturnal and usually peaceful with midwater fish, but territorial around caves. Shy individuals may miss meals in a crowded community.

Can be kept singly or in a managed breeding group if each adult has an appropriate cave and unobstructed feeding access.

Mature males defend caves and may trap or injure rivals when shelter is limited.

Choose calm companions that do not dominate the bottom. Avoid mixing L333 with similar Hypancistrus where hybridisation or confusion over offspring would matter.

Check tankmates for this species

Water Parameters

Temperature
26–31 °C
pH
5.5–7.5
GH
1–12
KH
0–6
TDS
30–220
Stability importance
Critical

Maintain stable, clean, oxygen-rich freshwater. Strong filtration and gas exchange are essential because warm water, protein-rich feeding, and loricariid waste can reduce oxygen and impair water quality.

Parameter caveat
Acclimate slowly to changes in temperature and conductivity. Keep ammonia and nitrite at zero, control nitrate, and never allow caves or rockwork to create stagnant waste pockets.

Feeding

Diet types
Carnivore, Insectivore, Omnivore
Feeding frequency
Daily
Preferred foods
  • High-quality carnivore sinking tabletUse a small protein-rich food delivered near each cave after lights dim.
  • Frozen brine shrimp, mysis, or insect larvaeOffer varied small animal foods several times each week.
  • Soft omnivore waferProvides fibre and plant matter alongside the protein-rich staple.
  • Natural biofilmMature hardscape supports supplementary grazing but does not replace deliberate feeding.

Feed a protein-oriented omnivorous diet with quality sinking foods, small crustaceans and insect-based foods, plus some plant matter. It is not a dependable algae eater.

Feed after lights dim and place food near every occupied cave. 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
29 °C
Breeding pH
6.5
Incubation
7 days
Parental care
Paternal care
Baby foods
  • Mature biofilmContinuous grazing supports fry between targeted feeds.
  • Finely powdered sinking foodFeed tiny portions close to the breeding cave several times daily.
  • Newly hatched brine shrimpUseful supplementary protein once fry leave the cave and can take moving prey.

Captive cave breeding is well established. The male guards the clutch inside a close-fitting cave, while clean oxygen-rich water and careful fry feeding support good survival.

Habitat and Origin

Geographic origin
Amazon Basin, Brazil, South America
Natural habitat
Fast-Flowing Stream, Freshwater River, Rocky Shoreline
Aquarium contexts
Breeding Tank, Freshwater Aquarium, High-Flow Aquarium, Species-Only Aquarium
Audience level
Advanced

Classification

Profile type
Undescribed species
Genus
Hypancistrus
Family
Loricariidae
Species group
Fish, Plecostomus

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