Skip to content
underwatergreen
Menu

Species profile

Fuessli’s Plecostomus L225/L442

Dolichancistrus fuesslii

Common names: Fuessli's Plecostomus L225/L442, L225, L442

Recognized speciesPlecostomus
Send Us A photo, be a contributor :)

Adult size

Up to 12 cm

Typical adult length 9–12 cm.

Up to 12 cm

Countries of origin

  • See all stock from Colombia

Good fit for your tank?

Good fit for

  • An advanced keeper with a cool high-flow stream aquarium
  • A species-focused rock and crevice setup
  • An aquarist able to monitor rare imported fish closely

Think carefully if

  • The aquarium is warm or weakly oxygenated
  • You need a hardy general community pleco
  • The fish cannot be quarantined and observed after import

Fuessli’s Plecostomus L225/L442 is a South American loricariid represented by L225, L442. It requires stable oxygen-rich water, suitable caves, and deliberate species-appropriate feeding.

Appearance and Identification

A slender mountain-stream loricariid with a flattened head, elongated fins and subdued mottled markings. Mature fish can develop conspicuous odontodes that give the body a bristled appearance.

Use the L-number identification L225, L442 together with the current assignment Dolichancistrus fuesslii. Do not merge it with visually similar forms without matching collection locality and diagnostic features.

Males develop stronger cheek, snout and pectoral odontodes and may have a more angular head. Females are smoother and fuller-bodied, but young fish are difficult to sex.

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

Create a cool, rapidly moving, highly oxygenated aquarium with smooth rock, narrow crevices and spotless water. It is poorly suited to warm stagnant community tanks.

Behaviour and Tankmates

A specialised rock-dweller that may defend a chosen crevice from similar fish. It is usually peaceful toward active species using the upper water layers.

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.

Choose small peaceful current-loving fish and avoid aggressive bottom dwellers. Multiple specimens require extensive rock structure and visual separation.

Check tankmates for this species

Water Parameters

Temperature
20–26 °C
pH
6–7.8
GH
2–15
KH
1–8
TDS
40–250
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
Aufwuchs Grazer, Insectivore, Omnivore
Feeding frequency
Daily
Preferred foods
  • Quality omnivore sinking waferUse a complete sinking food as the staple.
  • Frozen brine shrimp or insect larvaeOffer small portions for protein variety.
  • Natural biofilm and aufwuchsMaintain mature hardscape as supplementary grazing.
  • Vegetable-based waferProvides fibre and plant matter.

Offer natural biofilm, algae and vegetable-rich sinking foods with small insect or crustacean foods. Observe imported fish carefully because poor feeding can cause rapid loss of condition.

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
23 °C
Breeding pH
6.9
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.

Dependable aquarium breeding information is scarce. Any breeding attempt should focus on mature fish, exceptional oxygenation and secure crevices without assuming standard Ancistrus methods will work.

Habitat and Origin

Geographic origin
Colombia, South America
Natural habitat
Fast-Flowing Stream, Freshwater River, Rocky Shoreline
Aquarium contexts
Freshwater Aquarium, High-Flow Aquarium, Temperate Aquarium
Audience level
Advanced

Classification

Profile type
Recognized species
Genus
Dolichancistrus
Family
Loricariidae
Species group
Fish, Plecostomus
Previous scientific names
Dolichancistrus sp. (L225), Historic L-number designation retained for identification., Dolichancistrus sp. (L442), Historic L-number designation retained for identification.

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.

Furunculus Hypancistrus L199

Hypancistrus furunculus

Care level
Advanced
Adult size
9.6–12 cm
Minimum tank
90 litres
Temperature
26–31 °C

Fuscomaculatus Plecostomus L233

Hypostomus fuscomaculatus

Care level
Intermediate
Adult size
22.5–30 cm
Minimum tank
300 litres
Temperature
22–29 °C

Plan it with our tools