Skip to content
Menu

Species profile

Cactus Plecostomus L079

Pseudacanthicus sp. (L079)

Common names: Cactus Plecostomus L079, L079

Undescribed speciesPlecostomus

Countries of origin

  • See all stock from Brazil

Good fit for your tank?

Good fit for

  • An experienced keeper with a large predator-style pleco aquarium
  • A single-specimen display with strong filtration
  • A breeder equipped with dividers and oversized caves

Think carefully if

  • You want a peaceful mixed pleco community
  • The aquarium has shrimp, fry or delicate bottom fish
  • There is no safe way to separate fighting adults
  • You expect it to control algae

Cactus Plecostomus L079 is a South American loricariid represented by L079. It requires stable oxygen-rich water, suitable caves, and deliberate species-appropriate feeding.

Appearance and Identification

A heavily armoured cactus pleco with a dark body, pale spotting and prominent spines or odontodes. Adults develop a powerful head and a much more imposing build than small imported juveniles suggest.

Use the L-number identification L079 together with the current assignment Pseudacanthicus sp. (L079). Do not merge it with visually similar forms without matching collection locality and diagnostic features. The L-number remains the principal stable identifier because the form is undescribed or not conclusively assigned.

Mature males generally have a broader head and stronger odontodes on the cheeks, pectoral fins and body. Females are fuller through the abdomen, but sexing small fish is unreliable.

Tank Requirements

Suggested filter
About 1,600–2,000 litres an hour
Suggested heater
About 400–600 W for this tank
Minimum tank volume
400 litres
Minimum tank length
150 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 a very spacious aquarium with powerful filtration, high oxygenation, heavy rockwork and large secure caves. Every structure must be stable enough to withstand a strong territorial adult.

Behaviour and Tankmates

Predatory, nocturnal and often highly territorial with other loricariids. Adults may inflict serious injuries during disputes over caves or food.

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.

Use robust midwater companions and keep other plecos only in exceptionally spacious, divided layouts. Small crustaceans, fry and weak bottom fish are at risk.

Check tankmates for this species

Water Parameters

Temperature
25–30 °C
pH
5.5–7.5
GH
1–15
KH
0–7
TDS
40–260
Stability importance
Critical

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
Carnivore, Omnivore, Predator
Feeding frequency
Daily
Preferred foods
  • Quality carnivore sinking pelletUse a protein-rich sinking food near each shelter.
  • Frozen brine shrimp, mysis, or insect larvaeOffer varied aquatic animal foods.
  • Chopped mussel or prawnFeed clean small portions and remove remains promptly.
  • Soft omnivore waferProvides fibre and plant matter alongside the protein-rich staple.

Feed a protein-rich diet of quality carnivore pellets, crustacean and mollusc-based foods, with some plant matter for variety. It is not an algae-eating cleanup fish.

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
Specialist
Breeding temperature
27.5 °C
Breeding pH
6.5
Brood or egg count
Usually several dozen adhesive eggs; dependable species-specific fecundity data are unavailable.
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.

The genus is composed of male-guarded cave spawners, but specific reliable breeding details for L079 are limited. Pair aggression and the need for large caves make breeding an advanced project.

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
Specialist

Classification

Profile type
Undescribed species
Genus
Pseudacanthicus
Family
Loricariidae
Species group
Fish, Plecostomus
Previous scientific names
L079 listed under Hypostomus, The supplied grouping was corrected to Pseudacanthicus sp. (L079).

Have you kept this species?

You can write a note about what worked for you, or send a photograph. We check everything before it appears here.

Share a note or photo

JPG, PNG, or WebP, up to 5 MB.